| Phacelia | tanacetifolia | Bee Food |
| Phacelia | campanularia | Desert Bluebells |
| Phalaris | canariensis | Canary-grass |
| Phalaris | arundinacea | Reed Canary Grass |
| Phaseolus | angularis | Adzuki Bean |
| Phaseolus | | Beans |
| Phaseolus | vulgaris var. nanus | Bush Bean |
| Phaseolus | vulgaris | Kidney Bean |
| Phaseolus | lunatus | Lima Bush Beans |
| Phaseolus | vulgaris var. vulgaris | Pole Bean |
| Phaseolus | coccineus | Runner Beans |
| Phaseolus | acutifolius | Tepary Beans |
| Phellodendron | amurense | Amur cork tree |
| Philadelphus | lewisii | Mock-orange |
| Phlomis | fruticosa | Jerusalem Sage |
| Phlomis | cashmiriana | Kashmirian Sage |
| Phlomis | tuberosus | Tuberous Jerusalem Sage |
| Phlox | subulata | Moss Pink |
| Phoenix | canariensis | Canary Island Date Palm |
| Phoenix | dactylifera | Date |
| Phoradendron | flavescens | American Mistletoe |
| Phormium | tenax | New Zealand Flax |
| Photinia | x fraseri | Fraser Photinia |
| Photinia | japonica: | Loquat |
| Phragmites | australis | Common Reed |
| Phragmites | communis | Reed grass |
| Phyla | alba | Anise Verbena |
| Phyla | nodiflora | Frogfruit |
| Phyla | scaberrina | Lippia |
| Phyllantus | emblica | Myrobalan |
| Phyllitis | scolopendrium | Hart’s Tongue |
| Phyllodoce | empetriformis | Pink mountain-heather |
| Phyllodoce | glanduliflora | Yellow mountain-heather |
| Physalis | peruviana | Gooseberry |
| Physalis | viscosa | Ground Cherry |
| Physalis | | Husk Tomato |
| Physalis | ixocarpa | Tomatillo |
| Physalis | alkekengi | Winter Cherry |
| Physocarpus | capitatus | Pacific ninebark |
| Physostegia | | False Dragonhead |
| Physostegia | virginiana | False Dragonhead |
| Physostigma | venenosum | Calabar Bean |
| Phyteuma | | Horned Rampion |
| Phyteuma | spicatum | Spiked Rampion |
| Phytolacca | americana | Poke Root |
| Picea | pungens | Colorado Blue Spruce |
| Picea | glauca | Dwarf Alberta Spruce |
| Picea | engelmannii | Engelmann Spruce |
| Picea | koraiensis | Korean Pine |
| Picea | x lutzii | Lutz spruce |
| Picea | abies | Norway Spruce |
| Picea | sitchensis | Sitka Spruce |
| Picraena | excelsa | Quassia |
| Picramnia | antidesma | Amarga Cascara |
| Picrasma | excelsa | Quassia |
| Picris | hieracioides | Hawkweed Ox-tongue |
| Pieris | japonica | Japanese Pieris |
| Pilea | cadierei | Aluminium Plant |
| Pilea | pumila | Clearweed |
| Pilocarpus | jaborandi | Jaborandi |
| Pilocarpus | microphyllus | Jaborandi |
| Pilocarpus | pennatifolius | Pernambuco Jaborandi |
| Pimenta | dioica | Allspice |
| Pimenta | officinalis | Allspice |
| Pimenta | officinalis: | Allspice |
| Pimpinella | anisum | Anise |
| Pimpinella | saxifraga | Burnet Saxifrage |
| Pimpinella | major | Greater Burnet Saxifrage |
| Pinguicula | vulgaris | Butterwort |
| Pinus | nigra | Austrian Pine |
| Pinus | aristata | Bristlecone Pine |
| Pinus | roxburghii | Chir Pine |
| Pinus | sabiniana | Digger Pine |
| Pinus | pumila | Dwarf Japanese Stone Pine |
| Pinus | thunbergiana | Japanese Black Pine |
| Pinus | thunbergii | Japanese Black Pine |
| Pinus | densiflora | Japanese Red Pine |
| Pinus | parviflora | Japanese White Pine |
| Pinus | koraiensis | Korean Pine |
| Pinus | bungeana | Lacebark Pine |
| Pinus | contorta var. latifolia | Lodgepole pine |
| Pinus | radiata | Monterey Pine |
| Pinus | mugo | Mugo Pine |
| Pinus | | pines |
| Pinus | sylvestris | Scotch Pine |
| Pinus | contorta | Shore pine |
| Pinus | lambertiana | Sugar pine |
| Pinus | cembra | Swiss Stone Pine |
| Pinus | torreyana | Torrey Pine |
| Pinus | pinea | Umbrella Pine |
| Pinus | ponderosa | Western Yellow Pine |
| Pinus | monticola | White Pine |
| Pinus | strobus | White Pine |
| Pinus | albicaulis | Whitebark pine |
| Piper | betel | Betel |
| Piper | nigrum | Black pepper |
| Piper | cubeba | Cubebs |
| Piper | aduncum | False Matico |
| Piper | auritum | Holy Leaf |
| Piper | jaborandi | Jaborandi |
| Piper | methysticum | Kava Kava |
| Piper | longum | Long Pepper |
| Piper | officinarum | Long Pepper |
| Piper | pellucidum | Pellucoid-leaved Pepper |
| Piper | amalago | Rough-leaved Pepper |
| Piper | angustifolium | True Matico |
| Piper | umbellatum | Unbelled Pepper |
| Pirus | sinensis: | Chinese quince |
| Piscidia | erythrina | Jamaica Dogwood |
| Pistacia | chinensis | Chinese Pistache |
| Pistacia | lentiscus | Mastic |
| Pistacia | vera | Pistachio |
| Pisum | sativum | Peas |
| Pisum | sativum var. macrocarpon | Sugar Pea |
| Pittosporum | undulatum | Victorian Box |
| Plantago | coronopus | Buck’s Horn Plantain |
| Plantago | asiatica: | Common Plantain |
| Plantago | exaltata: | Common Plantain |
| Plantago | loureiri: | Common Plantain |
| Plantago | major | Common Plantain |
| Plantago | major var. asiatica: | Common Plantain |
| Plantago | media | Hoary Plantain |
| Plantago | ovata | Ispaghul Plantain |
| Plantago | amplexicaulis | Ispaghula |
| Plantago | afra | Psyllium Plantain |
| Plantago | lanceolata | Ribwort Plantain |
| Plantago | arenaria | Sand Plantain |
| Plantago | maritimo | Sea Plantain |
| Plantago | argentea | Silver Plantain |
| Platanthera | stricta | Slender bog-orchid |
| Platanthera | dilatata | White bog-orchid |
| Platanus | x acerifolia | London Planetree |
| Platycodon | | Balloon Flower |
| Platycodon | grandiflorus | Balloon Flower |
| Platycodon | autumnalis: | Balloon-flower |
| Platycodon | chinense: | Balloon-flower |
| Platycodon | grandiflorum | Balloon-flower |
| Platycodon | sinensis: | Balloon-flower |
| Plectranthus | | Cuban Oregano |
| Plectranthus | amboinicus | Cuban Oregano |
| Plectranthus | nankinensis: | Shiso |
| Pleurophycus | gardneri | kelp |
| Plumbago | europaea | Plumbago |
| Plumeira | alba | Frangipani Plant |
| Podophyllum | peltatum | American Mandrake |
| Pogonopus | febrifugus | Cascarilla |
| Pogostemon | heyneanus | Java Patchouli |
| Pogostemon | | Patchouli |
| Pogostemon | cablin | Patchouli |
| Pogostemon | patchouli: | Patchouli |
| Poinciana | gilliesii | Bird of Paradise Bush |
| Poinciana | pulcherrima | Pride of Barbados |
| Poinciana | pulcherrima var. flava | Yellow Dwarf Poinciana |
| Polemonium | reptans | Abscess Root (USA) |
| Polemonium | viscosum | Dwarf Jacob’s Ladder |
| Polemonium | foliosissimum | Fern Leaf Jacob’s Ladder |
| Polemonium | caeruleum | Jacob’s Ladder |
| Polemonium | carneum | Salmon Jacob’s Ladder |
| Polemonium | pulcherrimum | Sky Blue Jacob’s Ladder |
| Polemonium | pauciflorum | Yellow Jacob’s Ladder |
| Polianthes | tuberosa | Double Pearl Tuberose |
| Poliomintha | longiflora | Rosemary-mint |
| Polygala | senega | Senega |
| Polygonatum | biflorum | American Solomon’s Seal |
| Polygonatum | canaliculatum | Great Solomon’s Seal |
| Polygonatum | | Solomon’s Seal |
| Polygonatum | commutatum | Solomon’s Seal |
| Polygonatum | multiflorum | Solomon’s Seal |
| Polygonatum | officinale | Solomon’s seal |
| Polygonum | viviparum | Alpine Knotweed |
| Polygonum | .. | American Smartweed |
| Polygonum | aubertii | China Fleece Vine |
| Polygonum | cymosum | Chinese perennial Buckwh |
| Polygonum | convolvulus | Climbing Buckwheat |
| Polygonum | bistorta | Common bistort |
| Polygonum | sagittarum | False Buckwheat |
| Polygonum | | Fleece-flower |
| Polygonum | aviculare | Knotweed |
| Polygonum | orientale | Prince’s Plume |
| Polygonum | macrophyllum | Red Knotweed |
| Polygonum | erectum | Russian Knotgrass |
| Polygonum | arifoleum | Sickle-grass |
| Polygonum | hydropiper | Smartweed |
| Polygonum | tartaricum | Tartary Buckwheat |
| Polygonum | odoratum | Vietnamese Coriander |
| Polygonum | hydropiper ‘Fastigiatum’ | Waterpepper |
| Polymnia | uvedalia | American Bearsfoot |
| Polypodium | vulgare | Common Polypody |
| Polypodium | dryopteris | True Oak Fern |
| Polystichum | munitum | Giant Holly Fern |
| Polytrichum | juniperum | Hair Cap Moss |
| Poncirus | trifoliata | Trifoliate orange |
| Populus | nigra | Balm of Gilead (USA) |
| Populus | balsamifera | Balsam Poplar |
| Populus | trichocarpa | Balsam Poplar |
| Populus | balsamifera ssp. trichocarpa | Black cottonwood |
| Populus | canescens | Gray Poplar |
| Populus | | Poplar |
| Populus | tremuloides | Quaking Aspen |
| Populus | heterophylla | Swamp Cottonwood |
| Populus | alba | White Poplar |
| Poria | obliqua: | Clinker polypore |
| Porophyllum | ruderale ssp.macrocepha | Papaloquelite |
| Porphyra | umbilicalis | Laver Seaweed |
| Porphyra | | Nori |
| Porphyra | tenera | Nori |
| Porphyra | yezoensis | Nori |
| Porphyra | laciniata | Seaweed |
| Porphyra | perforata | Seaweed |
| Porphyra | vulgaris | Seaweed |
| Portulaca | sativa | Golden Purslane |
| Portulaca | oleracea | Green Purslane |
| Portulaca | | Moss Rose |
| Portulaca | grandiflora | Moss Rose |
| Portulaca | oleracea subsp. sativa | Summer Purslane |
| Potentilla | canadensis | Dwarf Cinquefoil |
| Potentilla | reptans | Five-leaf Grass |
| Potentilla | palustris | marsh fivefinger |
| Potentilla | fruticosa | shrubby cinquefoil |
| Potentilla | anserina | Silverweed |
| Potentilla | tridentata | Three-Toothed Cinquefoil |
| Potentilla | erecta | Tormentil |
| Potentilla | tormentilla | Tormentil |
| Poterium | officinale: | Garden burnet |
| Poterium | sanguisorba | Salad Burnet |
| Primula | auricula | Auricula |
| Primula | farinosa | Bird’s-eye Primrose |
| Primula | helodoxa | Candelabrum Primrose |
| Primula | veris | Cowslip |
| Primula | japonica | Japanese Primrose |
| Primula | viallii | Orchid Primrose |
| Primula | pulverulenta | Powdered Primrose |
| Primula | | Primrose |
| Primula | vulgaris | Primrose |
| Primula | florindae | Tibetan Primrose |
| Primula | acaulis | True English Primrose |
| Prinos | verticillatus | Black American Alder |
| Prosopis | dulcis | Caroba |
| Prosopis | siliquastrum | Caroba |
| Prosopis | | Mesquite |
| Prosopis | pubescens | Screw-bean |
| Prunella | grandiflora | Prunella Loveliness |
| Prunella | Webbiana | Purple Prunella |
| Prunella | vulgaris | Self-heal |
| Prunus | armeniaca | Apricot tree |
| Prunus | padus | Bird Cherry |
| Prunus | dulcis var. amara | Bitter Almond |
| Prunus | emarginata | Bitter cherry |
| Prunus | serotina | Black Cherry |
| Prunus | laurocerasus | Cherry Laurel |
| Prunus | cerasifera | Cherry Plum |
| Prunus | ilicifolia | Holly-leaved Cherry |
| Prunus | maackii | Manchurian Cherry |
| Prunus | persica | Peach |
| Prunus | pensylvanica | Pin Cherry |
| Prunus | lusitanica | Portugal Laurel |
| Prunus | domestica | Prunes |
| Prunus | x cistena | Purpleleaf Sand Cherry |
| Prunus | sargentii | Sargent Cherry |
| Prunus | spinosa | Sloe |
| Prunus | cerasus | Sour Cherry |
| Prunus | mahaleb | St Lucie Cherry |
| Prunus | dulcis | Sweet Almond |
| Prunus | serrula | Tibetan Cherry |
| Prunus | avium | Wild Cherry |
| Prunus | virginiana | Wild Cherry |
| Pseudocydonia | sinensis: | Chinese quince |
| Pseudotsuga | macrocarpa | Bigcone Douglas-fir |
| Pseudotsuga | menziesii | Douglas Fir |
| Psidium | | Guava |
| Psidium | guajava | Guava |
| Psidium | cattleianum | Strawberry Guava |
| Psoralea | melilotoides | Congo Root |
| Psoralea | esculenta | Prairie Apple |
| Psychotria | emetica | Black Ipecacuanha |
| Ptelea | trifoliata | Wafer Ash |
| Pteridium | aquilinum | Bracken |
| Pterocarpus | erinaceus | African Kino |
| Pterocarpus | marsupium | Bastard Teak |
| Pterocarpus | draco | Guadaloupe Dragon’s Bloo |
| Pterocarpus | santalinus | Red Saunders |
| Pterocarpus | angolensis | West African Barwood |
| Pterospora | andromeda | Albany Beech Drops |
| Pueraria | lobata | Kudzu Vine |
| Pueraria | thunbergiana | Kudzu vine |
| Pulmonaria | saccharata | Betlehem Sage |
| Pulmonaria | montana | Christmas Cowslip |
| Pulmonaria | officinalis | Common Lungwort |
| Pulmonaria | angustifolia | Cowslip Lungwort |
| Pulmonaria | mollissima | Hairy Lungwort |
| Pulsatilla | alpina | Alpine Anemone |
| Pulsatilla | nuttaliane | American Pulsatilla |
| Pulsatilla | vulgaris | Pasque Flower |
| Pulsatilla | vulgaris ‘Mixed colors’ | Pasque Flower |
| Pulsatilla | vernalis | Spring Anemone |
| Punica | granatum ‘Nana’ | Dwarf Pomegranate |
| Punica | | Pomegranate |
| Punica | granatum | Pomegranate |
| Pycnanthemum | pycnanthemoides | Hoary Mountain Mint |
| Pycnanthemum | | Mountain Mint |
| Pycnanthemum | pilosum | Mountain Mint |
| Pycnanthemum | teniufolium | Narrow-leaved Mountain Mi |
| Pycnanthemum | virginianum | Virginia Mint |
| Pycnanthemum | incanum | Wild Basil |
| Pyracantha | | Firethorn |
| Pyracantha | coccinea | Scarlet Firethorn |
| Pyrola | minor | Common Wintergreen |
| Pyrola | media | Intermediate Wintergreen |
| Pyrola | rotundifolia | Large Wintergreen |
| Pyrola | uniflora | One-flowered Wintergreen |
| Pyrola | secunda | Yevering Bells |
| Pyrus | americana: | American Mountain-Ash |
| Pyrus | calleryana | Callery Pear |
| Pyrus | fusca: | Pacific crab apple |
| Pyrus | communis | Pear |
| Pyrus | | Pears |
| Pyrus | malus var. astracanica: | Red Astrachan Apple |
| Quamoclit | x sloteri | Cardinal Climber |
| Quamoclit | pennata | Cypress Vine |
| Quassia | amara | Surinam Quassia |
| Quercus | kelloggii | California black oak |
| Quercus | pedunculata | Common Oak |
| Quercus | robur | Common Oak |
| Quercus | sessiliflora | Durmast Oak |
| Quercus | ilex | Evergreen Oak |
| Quercus | abelicea | False Sandalwood |
| Quercus | garryana | Garry oak |
| Quercus | coccifera | Kermes Oak |
| Quercus | virens | Live Oak |
| Quercus | virginiana | Live Oak |
| Quercus | | Oak |
| Quercus | palustris | Pin Oak |
| Quercus | tinctoria | Quercitron Bark |
| Quercus | petraea | Sessile Oak |
| Quercus | cerris | Turkey Oak |
| Quercus | alba | White Oak |
| Quillaria | saponaria | Soap Tree |
| Quisqualis | grandiflora: | Rangoon creeper |
| Quisqualis | indica | Rangoon creeper |
| Quisqualis | longifolia: | Rangoon creeper |
| Quisqualis | loureiri: | Rangoon creeper |
| Quisqualis | pubescens | Rangoon creeper |
| Quisqualis | sinensis: | Rangoon creeper |
| Rabitida | columnifera var. pulcherrima | Red Mexican Hat |
| Rabitida | columnifera | Yellow Mexican Hat |
| Radiola | linoides | All-seed |
| Ranunculus | bulbosus | Bulbous Buttercup |
| Ranunculus | sceleratus | Celery-leaved Crowfoot |
| Ranunculus | edulis | Egg-yolk |
| Ranunculus | ficaria | Lesser Celandine |
| Ranunculus | flammula | Lesser Spearwort |
| Ranunculus | rhomboideus | Prairie Buttercup |
| Ranunculus | acris | Upright Meadow Crowfoot |
| Raphanus | sativus ‘Acanthiformis’ | Daikon |
| Raphanus | bipinnatus | Daikon Radishes |
| Raphanus | caudatus | Java Radish |
| Raphanus | sativus | Radish |
| Raphanus | sibiricus | Siberian Radish |
| Raphanus | raphanistrum | Wild Radish |
| Raphia | farinifera | Raffia Palm |
| Ratibida | | Prairie Coneflower |
| Ratibida | pinnata | Prairie Coneflower |
| Ratibida | columnifera | Yellow Mexican Hat |
| Rauvolfia | serpentina | Rauwolfia |
| Rehmannia | elata | Chinese Foxglove |
| Rehmannia | glutinosa | Rehmannia |
| Reseda | odorata | Mignonette |
| Reseda | luteola | Weld |
| Rhamnus | catharticus | Buckthorn |
| Rhamnus | frangula | Buckthorn |
| Rhamnus | | Buckthorns |
| Rhamnus | purshianus | Californian Buckthorn |
| Rhamnus | purshiana | Cascara Sagrada |
| Rhamnus | zizyphus: | Chinese jujube |
| Rhamnus | … | Common Buckthorn |
| Rheum | palmatum subsp. tanguticum | Chinese Rhubarb |
| Rheum | x cultorum | Garden Rhubarb |
| Rheum | officinale | Medicinal rhubarb |
| Rheum | rhabarbarum | Rhubarb |
| Rheum | palmatum | Turkey Rhubarb |
| Rhinanthus | crista-galli | Yellow Rattle |
| Rhodiola | rosea | Rose Root |
| Rhodochiton | atrosanguineum | Purple Bell Vine |
| Rhododendron | hybr. | Azalea |
| Rhododendron | calendulaceum | Flame Azalea |
| Rhododendron | camtschaticum | Kamchatka rhododendron |
| Rhododendron | tomentosum | Marsh Tea |
| Rhododendron | catawbiense | Mountain Rose Bay |
| Rhododendron | macrophyllum | Pacific rhododendron |
| Rhododendron | | Rhododendron |
| Rhododendron | albiflorum | White-flowered rhododendr |
| Rhododendron | chrysanthum | Yellow Rhododendron |
| Rhodymenia | palmata | Dulse |
| Rhus | diversilobe | Californian Poison Oak |
| Rhus | javanica: | Chinese sumac |
| Rhus | osbeckii: | Chinese sumac |
| Rhus | semialata | Chinese sumac |
| Rhus | vernicifera | Japanese lacquer tree |
| Rhus | trilobata | Lemonade Sumac |
| Rhus | integrifolia | Lemonberry |
| Rhus | copallinum | Mountain Sumach |
| Rhus | toxicodendron | Poison Ivy |
| Rhus | coriaria | Sicilian Sumach |
| Rhus | glabra | Smooth Sumach |
| Rhus | typhina | Staghorn Sumach |
| Rhus | | Sumacs |
| Rhus | verni | Swamp Sumach |
| Rhus | aromatica | Sweet Sumach |
| Rhynchosia | phaseoloides | Semilla De Chintallahua |
| Ribes | nigrum | Black Currant |
| Ribes | lacustre | Black gooseberry |
| Ribes | | Currants |
| Ribes | lobbii | Gummy gooseberry |
| Ribes | acerifolium: | Maple currant |
| Ribes | howellii | Maple currant |
| Ribes | rubrum | Red Currant |
| Ribes | triste | Red swamp currant |
| Ribes | sanguineum | Red-flowering currant |
| Ribes | viscosissimum | Sticky currant |
| Ribes | bracteosum | Stinky currant |
| Ribes | laxiflorum | Trailing black currant |
| Ribes | sativum | White currant |
| Ribes | divaricatum | Wild gooseberry |
| Ribes | uva-crispa | Wild Gooseberry |
| Richardsonia | scabra | Undulated Ipecacuanha |
| Ricinus | communis | Castor Oil Plant |
| Ridolfia | segetum | False Caraway |
| Rivea | corymbosa | Oliliuqui |
| Robinia | pseudacacia | Black Locust |
| Robinia | | Locust |
| Roccella | tinctoria | Litmus |
| Rocella | tinctoria | Cudbear |
| Romneya | coulteri | Matilija Poppy |
| Rorippa | nasturtium-aquaticum | Watercress |
| Rosa | x alba | Alba Semiplena Rose |
| Rosa | chinensis var. minima | Angel Rose |
| Rosa | gallica ‘Officinalis’ | Apothecary’s Rose |
| Rosa | gymnocarpa | Baldhip rose |
| Rosa | spinosissima | Burnet Rose |
| Rosa | centifolia | Cabbage Rose |
| Rosa | amygdalifolia: | Cherokee rose |
| Rosa | cherokeansis: | Cherokee rose |
| Rosa | cucumerina: | Cherokee rose |
| Rosa | laevigana | Cherokee rose |
| Rosa | sinica Ait.: | Cherokee rose |
| Rosa | ternata: | Cherokee rose |
| Rosa | trifoliata: | Cherokee rose |
| Rosa | hystrix: | Cherokee rose: |
| Rosa | chinensis | China rose |
| Rosa | indica: | China rose |
| Rosa | sinica: | China rose |
| Rosa | pisocarpa | Clustered wild rose |
| Rosa | x damascena | Damask Rose |
| Rosa | canina | Dog Rose |
| Rosa | villosa | Downy Rose |
| Rosa | eglanteria | Eglantine |
| Rosa | arvensis | Field Rose |
| Rosa | moschata | Himalayan Musk Rose |
| Rosa | rugosa | Japanese Rose |
| Rosa | woodsii var. ultramontana | Mountain Rose |
| Rosa | linkii: | Multiflora rose |
| Rosa | multiflora | Multiflora rose |
| Rosa | muscatta: | Musk Rose |
| Rosa | nutkana | Nootka rose |
| Rosa | centifolia var. muscosa | Old Pink Moss Rose |
| Rosa | gallica | Red Provins Rose |
| Rosa | gallica ‘Versicolor’ | Rosa Mundi |
| Rosa | | Rose |
| Rosa | gallica x centifolia | Rose De Mai |
| Rosa | rubiginosa | Sweet Briar Rose |
| Rosa | indica | Tea Rose |
| Rosa | x damascena ‘Versicolor’ | York And Lancaster Rose |
| Rosmarinus | angustifolia | Pine Rosemary |
| Rosmarinus | | Rosemary |
| Rosmarinus | officinalis | Rosemary |
| Rubia | cordifolia | Indian Madder |
| Rubia | mungista: | Indian Madder |
| Rubia | tinctorum | Madder |
| Rubia | peregrina | Wild Madder |
| Rubus | villosus | American Blackberry |
| Rubus | odoratus | American Bramble |
| Rubus | leucodermis | Black raspberry |
| Rubus | allegheniensis | Blackberry |
| Rubus | fruticosus | Blackberry |
| Rubus | chamaemorus | Cloudberry |
| Rubus | caesius | Dewberry |
| Rubus | lasiococcus | Dwarf bramble |
| Rubus | acaulis: | Dwarf nagoonberry |
| Rubus | arcticus | Dwarf nagoonberry |
| Rubus | stellatus | Dwarf nagoonberry |
| Rubus | laciniatus | Evergreen blackberry |
| Rubus | pedatus | Five-leaved bramble |
| Rubus | discolor | Himalayan blackberry |
| Rubus | procerus: | Himalayan blackberry |
| Rubus | glaucus | Mora De Castilla |
| Rubus | cariensis | Raspberry |
| Rubus | idaeus | Raspberry |
| Rubus | strigosus | raspberry |
| Rubus | mucronotoides | Raspberry (Scottish) |
| Rubus | saxatilis | Roebuck-berry |
| Rubus | spectabilis | Salmonberry |
| Rubus | nivalis | Snow bramble |
| Rubus | parviflorus | Thimbleberry |
| Rubus | ursinus | Trailing blackberry |
| Rubus | occidentalis | Virginian Raspberry |
| Rudbeckia | hirta | Black-eyed Susan |
| Rudbeckia | triloba | Branched Coneflower |
| Rudbeckia | fulgida ‘Goldsturm’ | Golden Coneflower |
| Rudbeckia | laciniata | Greenheaded Coneflower |
| Rudbeckia | subtomentosa | Sweet Black-eyed Susan |
| Ruellia | humilis | Wild Petunia |
| Rumex | conglomeratus | Clustered Dock |
| Rumex | acetosa | Common Sorrel |
| Rumex | pulcher | Fiddle Dock |
| Rumex | rugosus | Garden Sorrel |
| Rumex | hydrolapathum | Great Water Dock |
| Rumex | dentatus | Indian Sorrel |
| Rumex | alpinus | Monk’s Rhubarb |
| Rumex | aquaticus | Red Dock |
| Rumex | sanguineus var. sanguineus | Red-veined Dock |
| Rumex | obtusifolius | Round-leaved Dock |
| Rumex | acetosella | Sheep’s Sorrel |
| Rumex | scutatus | True French Sorrel |
| Rumex | crispus | Yellow Dock |
| Ruscus | aculeatus | Butcher’s Broom |
| Ruta | graveolens | Rue |
| Sabal | palmetto | Cabbage Palmetto |
| Sabal | | Palmetto |
| Sabatia | angularis | American Centaury |
| Sabatia | campestris | Centaury |
| Sabatia | elliottii | Quinine Flower |
| Sagina | subulata | Corsican Pearlwort |
| Sagina | | Pearlwort |
| Sagittaria | sagittifolia | Arrowhead |
| Sagittaria | latifolia | Broad-leaved Arrowhead |
| Saintpaulia | ionantha | African violet |
| Salicornia | europaea | Glasswort |
| Salicornia | herbacea | Jointed Glasswort |
| Salisburia | adianthifolia: | Ginkgo |
| Salisburia | macrophylla: | Ginkgo |
| Salix | alaxensis | Alaska willow |
| Salix | arctica | Arctic willow |
| Salix | barclayi | Barclay’s willow |
| Salix | uva-ursi | Bearberry |
| Salix | viminalis x dasyclados | Biomass Willow |
| Salix | nigra | Black American Willow |
| Salix | cascadensis | Cascade willow |
| Salix | stolonifera | Creeping willow |
| Salix | geyeriana | Geyer’s willow |
| Salix | hookeriana | Hooker’s willow |
| Salix | reticulata | Netted willow |
| Salix | lasiandra: | Pacific willow |
| Salix | lucida ssp. lasiandra | Pacific willow |
| Salix | scouleriana | Scouler’s willow |
| Salix | sitchensis | Sitka willow |
| Salix | sessilifolia | Soft-leaved sandbar willo |
| Salix | commutata | Variable willow |
| Salix | babylonica | Weeping Willow |
| Salix | alba | White Willow |
| Salix | | Willows |
| Salpiglossis | sinuata | Paisley Flower |
| Salsola | kali | Prickly Glasswort |
| Salvia | pomifera | Apple-bearing Sage |
| Salvia | greggii | Autumn Sage |
| Salvia | grandiflora | Balsamic Sage |
| Salvia | mellifer | Black Sage |
| Salvia | uliginosa | Bog Sage |
| Salvia | apiana | California White Sage |
| Salvia | fulgens | Cardinal Sage |
| Salvia | roemeriana | Cedar Sage |
| Salvia | columbariae | Chia |
| Salvia | hispanica | Chia Sage |
| Salvia | sclarea | Clary Sage |
| Salvia | clevelandii | Cleveland Sage |
| Salvia | officinalis | Common Sage |
| Salvia | repens | Creeping Sage |
| Salvia | jurisicii | Feathered Salvia |
| Salvia | dorisiana | Fruit Sage |
| Salvia | patens | Gentian Sage |
| Salvia | officinalis ‘Aurea’ | Golden Sage |
| Salvia | fruticosa | Greek Sage |
| Salvia | glutinosa | Hardy Sage |
| Salvia | officinalis ‘Holt’s Mammoth’ | Holt’s Mammoth Sage |
| Salvia | lyrata | Lyre-leaved Sage |
| Salvia | pratensis | Meadow Sage |
| Salvia | farinacea | Mealy-cup Sage |
| Salvia | leucantha | Mexican Sage |
| Salvia | azurea | New Mexico Sage |
| Salvia | discolor | Peruvian Sage |
| Salvia | elegans | Pineapple Sage |
| Salvia | rutilans | Pineapple Sage |
| Salvia | spathacea | Pitcher Sage |
| Salvia | officinalis ‘Purpurascens’ | Purple Garden Sage |
| Salvia | officinalis ‘Purpurea’ | Purple Sage |
| Salvia | viridis | Red-topped Sage |
| Salvia | involucrata | Roseleaf Sage |
| Salvia | | Sage |
| Salvia | coccinea | Scarlet Sage |
| Salvia | argentea | Silver Sage |
| Salvia | lavandulifolia | Spanish Sage |
| Salvia | triloba | Spanish Sage Oil |
| Salvia | tiliaefolia | Tarahumara Chia Sage |
| Salvia | transylvanica | Transylvanian Sage |
| Salvia | officinalis ‘Tricolor’ | Tricolor Sage |
| Salvia | verbenaca | Vervain Sage |
| Salvia | verticillata | Whorled Clary |
| Salvia | horminoides | Wild Clary |
| Sambucus | canadensis | American Elder |
| Sambucus | racemosa ssp. pubens var. melanocar | Black elderberry |
| Sambucus | glauca | Blue Elder |
| Sambucus | caerulea | Blue elderberry |
| Sambucus | ebulus | Dwarf Elder |
| Sambucus | | Elder |
| Sambucus | nigra | Elder |
| Sambucus | racemosa ssp. pubens | Red elderberry |
| Sambucus | melanocarpa | Red-berried American Eld |
| Sambucus | rubens | Red-berried American Eld |
| Sambucus | racemosa | Red-berried Elder |
| Sangiusorba | minor | Salad Burnet |
| Sanguinaria | canadensis | Bloodroot |
| Sanguisorba | | Burnet |
| Sanguisorba | carnea: | Garden burnet |
| Sanguisorba | officinalis | Great Burnet |
| Sanguisorba | minor | Salad Burnet |
| Sanicula | europaea | Wood Sanicle |
| Santalum | | Sandalwood |
| Santalum | album | White sandalwood |
| Santalum | myrtifolium: | White sandalwood |
| Santalum | verum: | White sandalwood |
| Santolina | chamaecyparissus ‘Nana’ | Dwarf Santolina |
| Santolina | incana | Gray Santolina |
| Santolina | virens | Green Santolina |
| Santolina | chamaecyparissus | Lavender Cotton |
| Santolina | neapolitana | Neapolitan Santolina |
| Santolina | rosmarinifolia | Rosemary Santolina |
| Sanvitalia | procumbens | Creeping zinnia |
| Sapium | sebiferum | Chinese Tallow |
| Sapium | salicifolium | Tallow Tree |
| Saponaria | vaccaria | Cowherd |
| Saponaria | ocymoides | Rock Soapwort |
| Saponaria | | Soapwort |
| Saponaria | officinalis | Soapwort |
| Sarenoa | serrulata | Saw Palmetto |
| Sarothamnus | scoparius | Broom |
| Sarracenia | purpurea | Pitcher Plant |
| Sarsaparilla | officinalis | Caracao Sarsaparilla |
| Sassafras | albidum | Sassafras |
| Sassafras | officinale: | Sassafras |
| Satureja | calamintha | Calamint |
| Satureja | repandra | Creeping Savory |
| Satureja | biflora | Lemon Savory |
| Satureja | thymbra | Persian Zatar |
| Satureja | | Savory |
| Satureja | hortensis | Summer Savory |
| Satureja | montana | Winter Savory |
| Satureja | douglasii | Yerba buena |
| Saussurea | lappa | Costus |
| Saxifraga | micranthidifolia | Deertongue |
| Saxifraga | x arendsii | Saxifrage |
| Scabiosa | columbaria | Lesser Scabious |
| Scabiosa | stellata | Moonflower |
| Scandix | cerefolium | Chervil |
| Schefflera | arboricola | Dwarf Schefflera |
| Schinopsis | lorenzii | Quebracho Wood |
| Schinus | terebinghifolius | Brazilian Pepper Tree |
| Schinus | molle | California Pepper Tree |
| Schinus | | Pink Peppercorns |
| Schisandra | chinensis | Schisandra |
| Schizanthus | | Butterfly Flower |
| Schizanthus | pinnatus | Butterfly Flower |
| Schlumbergera | bridgesii | Christmas Cactus |
| Schoenoplectus | lacustris | Great Club-rush |
| Schotia | | Boerboom |
| Schotia | brachypetala | Tree Fuchsia |
| Sciadopitys | verticillata | Umbrella Pine |
| Scirpus | saetaceus | Bristle-like Mud-rush |
| Scirpus | nanus | Dwarf Club-rush |
| Scirpus | fluitans | Floating Mud-rush |
| Scirpus | holoschoeuus | Round-headed Mud-rush |
| Scirpus | cernuus | Savi’s Mud-rush |
| Scoliopus | hallii | Slink lily |
| Scolymus | cardunculus | Cardoon Artichoke |
| Scolymus | … | Yellow Thistle |
| Scoparia | dulcis | Vacourinha |
| Scopolia | carniolica | Scopolia |
| Scorodosma | foetida | Asafetida |
| Scorzonera | hispanica | Black Salsify |
| Scorzonera | exile | Wild Salsify |
| Scrophularia | scorodoma | Balm-leaved Figwort |
| Scrophularia | | Figwort |
| Scrophularia | nodosa | Knotted Figwort |
| Scrophularia | aquatica | Water Figwort |
| Scrophularia | vernalis | Yellow Figwort |
| Scutellaria | grandiflora: | Baical skullcap |
| Scutellaria | lanceolaria: | Baical skullcap |
| Scutellaria | macrantha: | Baical skullcap |
| Scutellaria | baicalensis | Baikal Skullcap |
| Scutellaria | galericulata | Common Scullcap |
| Scutellaria | minor | Lesser Scullcap |
| Scutellaria | lateriflora | Virginian Scullcap |
| Scytalia | chinensis: | Litchi |
| Sedum | morganianum | Burro’s tail |
| Sedum | acre | Common Stonecrop |
| Sedum | reflexum | Crooked Yellow Stonecrop |
| Sedum | villosum | Hairy Stonecrop |
| Sedum | telephium | Orpine Stonecrop |
| Sedum | | Stonecrop |
| Sedum | sexangulare | Tasteless Yellow Stonecro |
| Sedum | dasyphyllum | Thick-leaved Stonecrop |
| Sedum | fosterianum | Welsh Stonecrop |
| Sedum | album | White Stonecrop |
| Sedum | anglicum | White-flowered Stonecrop |
| Semecarpus | anacardium | Oriental Cashew Nut |
| Sempervivum | | Houseleek |
| Sempervivum | tectorum | Houseleek |
| Senecio | x hybridus | Cineraria |
| Senecio | vulgaris | Common Groundsel |
| Senecio | erucifolius | Hoary Groundsel |
| Senecio | aureus | Life Root |
| Senecio | aquaticus | Marsh Ragwort |
| Senecio | sylvaticus | Mountain Groundsel |
| Senecio | jacobaea | Ragwort |
| Senecio | triangularis | Ragwort |
| Senecio | bicolor | Sea Ragwort |
| Senecio | viscosus | Viscid Groundsel |
| Sequoia | sempervirens | Coast Redwood |
| Sequoiadendron | gigantea | Giant Redwood |
| Sequoiadendron | giganteum | Giant Sequoia |
| Serenoa | repens | Saw Palmetto |
| Serissa | foetida | Serissa |
| Sesamum | indicum | Sesame |
| Sesamum | orientale | Sesame |
| Sesamum | orientale: | Sesame |
| Sesbania | grandiflora | Vegetable Hummingbird |
| Sesbania | cannabina | Yellow Pea-bush |
| Setaria | italica | Foxtail Millet |
| Shepherdia | canadensis | Soopolallie |
| Sicana | odorifera | Cassabanana |
| Siegesbeckia | orientalis | Siegesbeckia |
| Silene | cucubalus | Bladder Campion |
| Silene | | Campion |
| Silene | armeria | None So Pretty |
| Silene | regia | Royal Catchfly |
| Silphium | laciniatum | Compass Plant |
| Silphium | perfoliatum | Cup Plant |
| Silphium | terebinthinaceum | Prairie Dock |
| Silphium | ginniferum | Rosin Weed |
| Silphium | integrifolium | Rosinweed |
| Silphium | paciniatum | Rosin-weed |
| Silybum | | Milk Thistle |
| Silybum | marianum | Milk Thistle |
| Silybum | eburneum | Silver Milk Thistle |
| Simaba | cedron | Cedron |
| Simaruba | amara | Simaruba |
| Simaruba | officinalis | Simaruba |
| Simaruba | versicolor | Simaruba (Brazil) |
| Simaruba | glauca | Wing-leaved Quassia |
| Simmondsia | chinensis | Jojoba |
| Sinapis | arvensis | Field Mustard |
| Sinapis | alba | White Mustard |
| Sirium | myrtifolium: | White sandalwood |
| Sison | amomum | Breakstone |
| Sisymbrium | officinale | Common Hedge Mustard |
| Sisymbrium | sofia | Flixweed |
| Sisyrinchium | | Blue-eyed Grass |
| Sisyrinchium | angustifolium | Blue-eyed Grass |
| Sisyrinchium | idahoense var. macounii | Blue-eyed-grass |
| Sisyrinchium | californicum | Golden-eyed-grass |
| Sisyrinchium | douglasii | Satin-flower |
| Sisyrinchium | littorale | Shore blue-eyed-grass |
| Sium | sisarum | Skirret |
| Sium | latifolium | Water Parsnip |
| Smilacina | racemosa | False Solomon’s Seal |
| Smilacina | stellata | Star-flowered false Solom |
| Smilax | china | China Smilax |
| Smilax | pseudo-china | China Smilax |
| Smilax | | Greenbrier |
| Smilax | spruceana | Guatemala Sarsaparilla |
| Smilax | officinalis | Honduras Sarsaparilla |
| Smilax | aspera | Italian Sarsaparilla |
| Smilax | ornata | Jamaica Sarsaparilla |
| Smilax | anceps | Mauritius Sarsaparilla |
| Smilax | rotundifolia | Mexican Sarsaparilla |
| Smyrnium | olusatrum | Alexanders |
| Solanum | mammosum | Apple of Sodom |
| Solanum | sodomaeum | Apple of Sodom |
| Solanum | nigrum | Black Nightshade |
| Solanum | melongena var. esculentum | Egg Plant |
| Solanum | melongena | Eggplants |
| Solanum | carolinense | Horsenettle |
| Solanum | oleraceum | Jagueribo |
| Solanum | pseudo-capsicum | Jerusalem Cherry |
| Solanum | xanthocarpum | Kantikari |
| Solanum | aculeatissimum | Loveapple |
| Solanum | quitoense | Naranjilla |
| Solanum | tuberosum | Potato |
| Solanum | integrifolium | Ruffled Red Eggplant |
| Solanum | melanocerasum | Sunberry |
| Solanum | laciniatum | Tasmanian Kangaroo Apple |
| Solanum | erianthum | Tobacco Nightshade |
| Solanum | dulcamara | Woody Nightshade |
| Solidago | canadensis | golden rod |
| Solidago | virgaurea | Golden Rod |
| Solidago | | Goldenrod |
| Solidago | rigida | Hardleaf Goldenrod |
| Solidago | glomerata | Ornamental Goldenrod |
| Solidago | speciosa | Showy Goldenrod |
| Solidago | gigantea | Smooth Three-ribbed Golde |
| Solidago | odora | Sweet-scented Goldenrod |
| Sollya | heterophylla | Australian Bluebell Creep |
| Sollya | | Bluebell Creeper |
| Sonchus | oleraceus | Common Sow-thistle |
| Sonchus | arvensis | Corn Sow-thistle |
| Sonchus | palustris | Marsh Sow-thistle |
| Sonchus | alpina | Mountain Sow-thistle |
| Sonchus | tartaricus | Siberian Sow-thistle |
| Sophora | secundiflora | Mescal Bean |
| Sophora | japonica | Pagoda tree |
| Sophora | tomentosa | Silverbush |
| Sorbus | americana | American Mountain Ash |
| Sorbus | aria | Common Whitebeam |
| Sorbus | aucuparia | Mountain Ash |
| Sorbus | aucuparia var. moravica | Rowan |
| Sorbus | domestica | Service-tree |
| Sorbus | sitchensis | Sitka mountain-ash |
| Sorbus | scopulina | Western mountain-ash |
| Sorbus | torminalis | Wild Service-tree |
| Sorghastrum | | Indiangrass |
| Sorghastrum | nutans | Indiangrass |
| Sorghum | bicolor | Broomcorn |
| Sorghum | vulgare | Broom-Corn |
| Sorghum | nigrum | Ornamental Grass |
| Sorghum | | Sorghum |
| Sorreya | californica | Californian Nutmeg |
| Spartina | stricta | Common Cord-grass |
| Spartina | towsendi | Many-spiked Cord-grass |
| Spartina | pectinata | Prairie Cordgrass |
| Spartium | junceum | Spanish Broom |
| Spathodea | campanulata | Flame Tree |
| Specularia | speculum-veneris | Venus’s Looking Glass |
| Sphaerostema | japonica: | Schisandra |
| Sphagnum | | sphagnum moss |
| Sphagnum | cymbifolium | Sphagnum Moss |
| Spigelia | marylandica | Pink Root |
| Spilanthes | acmella | Toothache Plant |
| Spilanthes | oleracea | Toothache Plant |
| Spinaca | oleracea | Spinach |
| Spiraea | douglasii | Hardhack |
| Spiraea | menziesii: | Hardhack |
| Spiraea | tomentosa | Hardhack |
| Spiraea | x vanhouttei | Spirea |
| Spiraea | bauverdiana: | Steven’s spirea |
| Spiraea | stevenii | Steven’s spirea |
| Spiraea | densiflora | Subalpine spirea |
| Spiraea | salyciflora | Willow-leaved Spirea |
| Spiranthes | autumnalis | Lady’s Tresses |
| Spondias | dulcis | Oatahette Apple |
| Sporobolus | heterolepis | Prairie Dropseed |
| Sporobolus | cryptandrus | Sand Dropseed |
| Stachys | | Betony |
| Stachys | scardia | Betony |
| Stachys | sieboldii | Chinese Artichoke |
| Stachys | monnieri | Dense-flowered Betony |
| Stachys | arvensis | Field Stachys |
| Stachys | sylvatica | Hedge Woundwort |
| Stachys | palustris | Marsh Woundwort |
| Stachys | grandiflora | Showy Betony |
| Stachys | germanica | True Woundwort |
| Stachys | betonica | Wood Betony |
| Stachys | officinalis | Wood Betony |
| Stachys | byzantina | Woolly Lamb’s Ear |
| Stachytarpetha | jamaicensis | Blue Porter Weed |
| Statice | caroliniana | American Sea Lavender |
| Stellaria | media | Chickweed |
| Stellaria | | Stitchwort |
| Stenanthium | occidentale | Mountainbells |
| Stevia | rebaudiana | Stevia |
| Stewartia | pseudocamellia | Japanese Stewartia |
| Sticta | pulmonaria | Lungwort |
| Stillinga | sylvatica | Queen’s Delight |
| Stipa | | Feather Grass |
| Stipa | pennata | Feather Grass |
| Stipa | capillata | Needlegrass |
| Stipa | lepida | Small Feathergrass |
| Stratiotes | aloides | Water Soldier |
| Strelitzia | reginae | Bird of Paradise |
| Strelitzia | nicolai | White Bird of Paradise |
| Streptopus | amplexifolius | Clasping twistedstalk |
| Streptopus | roseus | Rosy twistedstalk |
| Streptopus | streptopoides | Small twistedstalk |
| Strophanthus | gratus | Strophantus |
| Strophanthus | hispidus | Strophantus |
| Strophanthus | kombé | Strophantus |
| Strophanthus | nicholsoni | Strophantus |
| Strychnos | pseudo | Clearing Nuts |
| Strychnos | toxifera | Curare |
| Strychnos | ignatii | Ignatius Beans |
| Strychnos | nux-vomica | Strychnine tree |
| Strychnos | tieute | Upas Tieute |
| Stylomecon | heterophylla | Wind Poppy |
| Stylophorum | diphyllum | Nuttall |
| Styphnolobium | japonicum: | Pagoda tree |
| Styrax | | Benzoin |
| Styrax | benzoin | Benzoin |
| Styrax | japonicus | Japanese Snowbell |
| Styrax | officinale | Storax |
| Succisa | pratensis | Devil’s Bit Scabious |
| Suoeda | maritima | Annual Sea Blite |
| Suoeda | fruticosa | Sea-Blite |
| Suoeda | | Sea-blites |
| Sutherlandia | | Cape Bladder Senna |
| Sutherlandia | frutescens | Duck Plant |
| Swainsonia | galegifolius | Swainson’s Pea |
| Swertia | chirata | Chiretta |
| Symphoricarpos | racemosus | Snowberry |
| Symphoricarpos | mollis | Trailing snowberry |
| Symphoricarpos | albus | Waxberry |
| Symphytum | | Comfrey |
| Symphytum | grandiflorum | Comfrey |
| Symphytum | tuberosum | Comfrey |
| Symphytum | officinale | Common Comfrey |
| Symphytum | asperum | Prickly Comfrey |
| Symphytum | rubrum | Red Comfrey |
| Symphytum | x uplandicum | Russian Comfrey |
| Symplocarpus | foetidus | Skunk-cabbage |
| Syringa | | Lilac |
| Syringa | vulgaris | Lilacs |
| Syringa | suspensa: | Weeping golden bell |
| Syzygium | aromaticum | Cloves |
| Tabebuia | impetiginosa | Pau d’arco |
| Tacca | oceanica | Tahiti Arrowroot |
| Tagetes | erecta | African Marigold |
| Tagetes | patula ‘Sparky’ | French Marigold |
| Tagetes | filifolia | Irish Lace Marigold |
| Tagetes | tenuifolia | Lemon Marigold |
| Tagetes | | Marigold |
| Tagetes | minuta | Mexican Marigold |
| Tagetes | lucida | Mexican Mint Marigold |
| Talinum | | Fame Flower |
| Talinum | paniculatum | Jewels of Opar |
| Tamarindus | indica | Tamarind |
| Tamarix | gallica var. mannifera | Tamarisk Manna |
| Tamus | communis | Black Bryony |
| Tamus | cretica | Bryony |
| Tanacetum | balsamita | Costmary |
| Tanacetum | vulgare ‘Crispum’ | Curled Tansy |
| Tanacetum | cinerariifolium | Dalmatian Pellitory |
| Tanacetum | parthenium | Feverfew |
| Tanacetum | parthenium ‘Aureum’ | Golden Feverfew |
| Tanacetum | coccineum | Persian Pellitory |
| Tanacetum | niveum | Silver Tansy |
| Tanacetum | vulgare | Tansy |
| Tapeinochillis | ananassae | Malaysian Spiral Ginger |
| Taraktogenos | kurzii | Chaulmoogra |
| Taraxacum | | Dandelion |
| Taraxacum | ceratophorum: | Dandelion |
| Taraxacum | corniculatum: | Dandelion |
| Taraxacum | dens-leonis: | Dandelion |
| Taraxacum | officinale | Dandelion |
| Taraxacum | sinense: | Dandelion |
| Taraxacum | officinale var. sativum | Improved Dandelion |
| Taxodium | distichum | Baldcypress |
| Taxus | brevifolia | Western yew |
| Taxus | | Yew |
| Tecoma | grandiflora: | Chinese trumpet-creeper |
| Tecoma | stans | Trovadora |
| Telekia | speciosa | Heartleaf Oxeye |
| Tellima | | Fringe Cup |
| Tellima | grandiflora | Fringe Cups |
| Templetonia | retusa | Cock’s Comb |
| Templetonia | | Coral Bush |
| Tetragonia | expansa: | New Zealand Spinach |
| Tetragonia | tetragonioides | New Zealand Spinach |
| Tetrapanax | papyrifera | Rice-paper tree |
| Teucrium | marum | Cat Thyme |
| Teucrium | canadense | Creeping Germander |
| Teucrium | polium | Ezovion |
| Teucrium | | Germander |
| Teucrium | scorodonia | Sage-leaved Germander |
| Teucrium | fruticans | Silver Germander |
| Teucrium | chamaedrys | Wall Germander |
| Teucrium | scordium | Wood Sage |
| Thalictrum | | Meadow Rue |
| Thalictrum | dasycarpum | Meadowrue |
| Thapsia | garganica | Thapsia |
| Thea | assamica: | Tea plant |
| Thea | bohea: | Tea plant |
| Thea | cantoniensis: | Tea plant |
| Thea | chinensis: | Tea plant |
| Thea | cochinchinensis: | Tea plant |
| Thea | sinensis | Tea plant |
| Thea | sinensis: | Tea plant |
| Thea | stricta jassamica: | Tea plant |
| Thea | veridis: | Tea plant |
| Thea | viridis: | Tea plant |
| Theobroma | cacao | Cacao |
| Thermopsis | caroliniana | Carolina Lupin |
| Thermopsis | | Mountain Pea |
| Thermopsis | montana | Mountain Thermopsis |
| Thermopsis | fabacea | Russian False Lupin |
| Thermopsis | lupinoides | Siberian Lupin |
| Thespesia | populnea | Portia Tree |
| Thlaspi | arvense | Pennycress |
| Thlaspi | rotundifolium | Round-leaved Pennycress |
| Thuja | | Cedar |
| Thuja | orientalis | Chinese Arbor Vitae |
| Thuja | plicata | Red Cedar |
| Thuja | articulata | Sandarac |
| Thuja | occidentalis | Yellow Cedar |
| Thunbergia | alata | Black-eyed Susan |
| Thunbergia | | Clock Vine |
| Thymbra | spicata | Spiked Thyme |
| Thymus | herba-barona | Caraway Thyme |
| Thymus | praecox | Creeping Thyme |
| Thymus | praecox subsp. arcticus | Crimson Thyme |
| Thymus | praecox subsp. arcticus ‘Coccineus’ | Crimson Thyme |
| Thymus | vulgaris ‘Doretta Klaber’ | Doretta Klaber Thyme |
| Thymus | vulgaris | Garden Thyme |
| Thymus | thracicus | Lavender Thyme |
| Thymus | thracius | Lavender Thyme |
| Thymus | x citriodorus | Lemon Thyme |
| Thymus | pulegioides | Mother of Thyme |
| Thymus | zygis | Sauce Thyme |
| Thymus | mastichina | Spanish Wood Marjoram |
| Thymus | | Thyme |
| Thymus | praecox subsp. arcticus ‘Albus’ | White Moss Creeping Thyme |
| Thymus | drucei | Wild Thyme |
| Thymus | serpyllum | Wild Thyme |
| Thymus | pseudolanuginosus | Woolly Thyme |
| Thymus | praecox subsp.arcticus var.pseudola | Wooly Thyme |
| Tiarella | cordifolia | Coolwort |
| Tilia | americana | American Linden |
| Tilia | vulgaris | Common Lime |
| Tilia | europaea | Lime |
| Tilia | | Lime Tree |
| Tilia | platyphyllos | Lime Tree |
| Tilia | x vulgaris | Lime Tree |
| Tilia | cordata | Littleleaf Linden |
| Tilia | heterophylla | White Basswood |
| Tithonia | | Mexican Sunflower |
| Tithonia | rotundifolia | Mexican Sunflower |
| Tithonia | speciosa | Mexican Sunflower |
| Tofieldia | | False Asphodel |
| Tofieldia | palustris | Scotch Asphodel |
| Tofieldia | glutinosa | Sticky false asphodel |
| Toxylon | pomiferum | Osage Orange |
| Trachelium | coeruleum | Throatwort |
| Trachelospermum | divaricatum: | Star jasmine |
| Trachelospermum | jasminoides | Star jasmine |
| Trachycarpus | excelsa: | Hemp palm |
| Trachycarpus | fortunei | Hemp palm |
| Trachyspermum | ammi | Ajowan |
| Tradescantia | ohiensis | Spiderwort |
| Tragopogon | pratensis | Jack-go-to-bed-at-noon |
| Tragopogon | porrifolius | Salsify |
| Trapa | natans | Water Chestnut |
| Trichocereus | pachanoi | San Pedro Cactus |
| Trichophorum | cespitosum | Deer’s Hair |
| Trichosanthes | japonica | Chinese Cucumber |
| Trichosanthes | kirilowii | Chinese Cucumber |
| Trichosanthes | palmata: | Chinese cucumber |
| Trichosanthes | rosthornii | Chinese Cucumber |
| Trichosanthes | anguina | Snake Gourd |
| Tricyrtis | hirta | Toad Lily |
| Trientalis | europaea | Chickweed Wintergreen |
| Trifolium | incarnatum | Crimson Clover |
| Trifolium | pratense | Red Clover |
| Trifolium | repens | White Clover |
| Trigonella | foenum-graecum | Fenugreek |
| Trillium | pendulum | Bethroot |
| Trillium | grandiflorum | Large-flowered Trillium |
| Trillium | chloropetalum | Sessile trillium |
| Trillium | hibersonii: | Western trillium |
| Trillium | ovatum | Western trillium |
| Tripleurospermum | inodorum | Scentless Mayweed |
| Tripsacum | dactyloides | Eastern Gama Grass |
| Triteleia | laxa | Grass Nut |
| Triteleia | howellii: | Howell’s brodiaea |
| Triticum | vulgare | Common wheat |
| Triticum | | Wheat |
| Triticum | aestivum | Wheat |
| Trollius | asiaticus | Asiatic Globe Flower |
| Trollius | laxus | Globe Flower (USA) |
| Tropaeolum | peregrinum | Canary Bird Vine |
| Tropaeolum | minus | Empr of India Nasturtium |
| Tropaeolum | | Nasturtium |
| Tropaeolum | majus | Nasturtium |
| Tsuga | canadensis | Hemlock Spruce |
| Tsuga | mertensiana | Mountain Hemlock |
| Tsuga | heterophylla | Western Hemlock |
| Tulbaghia | violacea | Society Garlic |
| Tulipa | edulis | Edible tulip |
| Tulipa | graminifolia: | Edible tulip |
| Tunica | saxifraga | Coat Flower |
| Tunica | | Tunic Flower |
| Turnera | aphrodisiaca | Damiana |
| Turnera | diffusa | Damiana |
| Tussilago | farfara | Coltsfoot |
| Typha | | Cattail |
| Typha | latifolia | Cattail |
| Typha | domingensis | tule cattail |
| Ulex | europaeus | Golden Gorse |
| Ulmus | chinensis | Chinese Elm |
| Ulmus | procera | Common Elm |
| Ulmus | campestris | English elm |
| Ulmus | glabra | English elm |
| Ulmus | parvifolia | Lacebark Elm |
| Ulmus | scabra | Scotch Elm |
| Ulmus | fulva | Slippery Elm |
| Ulmus | rubra | Slippery Elm |
| Ulmus | alata | Winged Elm |
| Ulva | lactuca | Sea Lettuce |
| Umbellularia | californica | California Bay |
| Umbilicus | rupestris | Pennywort |
| Uncaria | gambir | Pale Catechu |
| Ungnadia | speciosa | Texan Buckeye |
| Urginea | indica | Indian Squill |
| Urginea | scilla | Squill |
| Urginea | maritima | White Squill |
| Urtica | tenacissima: | China grass |
| Urtica | utilis: | China grass |
| Urtica | dioica | Greater Nettle |
| Urtica | canadensis | Kentucky Hemp |
| Urtica | cannabina | Kentucky Hemp |
| Urtica | urens | Lesser Nettle |
| Urtica | | Nettle |
| Usnea | | Old man’s beard |
| Vaccaria | | Cockle |
| Vaccaria | segetalis | Cowcockle |
| Vaccinium | alaskaense | Alaskan blueberry |
| Vaccinium | myrtillus | Bilberry |
| Vaccinium | membranaceum | Black huckleberry |
| Vaccinium | | Blueberry |
| Vaccinium | deliciosum | Blue-leaved huckleberry |
| Vaccinium | ovatum | California Huckleberry |
| Vaccinium | oxycoccus | Cranberry |
| Vaccinium | macrocarpum | Cranberry (Am.) |
| Vaccinium | caespitosum | Dwarf blueberry |
| Vaccinium | arboreum | Farkleberry |
| Vaccinium | corymbosum | Highbush Blueberry |
| Vaccinium | vitis-idaea | lingonberry |
| Vaccinium | angustifolium | Lowbush Blueberry |
| Vaccinium | uliginosum | Northern Bilberry |
| Vaccinium | ovalifolium | Oval-leaved blueberry |
| Vaccinium | parvifolium | Red huckleberry |
| Valeriana | cornucopiae | African Valerian |
| Valeriana | cornucopiae: | African Valerian |
| Valeriana | montana | Dwarf Valerian |
| Valeriana | edulis | edible valerian |
| Valeriana | pyrenaica | Heart-leaved Valerian |
| Valeriana | wallichii | Indian Valerian |
| Valeriana | dioica | Marsh Valerian |
| Valeriana | mexicana | Mexican Valerian |
| Valeriana | jatamansi | Nard |
| Valeriana | sitchensis | Sitka Valerian |
| Valeriana | | valerian |
| Valeriana | officinalis | Valerian |
| Valeriana | sylvestris: | Valerian |
| Valeriana | aquatica | Water Valerian |
| Valerianella | locusta | Corn Salad |
| Vanilla | planifolia | Vanilla |
| Venidium | fastuosum | Monarch of the Veldt |
| Venidium | fastuosum alba | Zulu Prince |
| Veratrum | nigrum | Black False Hellebore |
| Veratrum | californicum | California false hellebor |
| Veratrum | | False Hellebore |
| Veratrum | viride | Green Hellebore |
| Veratrum | officinale | Sabadilla |
| Veratrum | sabadilla | Sabadilla |
| Veratrum | album | White Hellebore |
| Verbascum | chaixii | Chaix Mullein |
| Verbascum | nigrum | Dark Mullein |
| Verbascum | densiflorum | Dense Mullein |
| Verbascum | thapsus | Great Mullein |
| Verbascum | wiedemannianum | Indigo Mullein |
| Verbascum | longifolium | Long-leaved Mullein |
| Verbascum | blattaria | Moth Mullein |
| Verbascum | phoenicum | Ornamental Mullein |
| Verbascum | phlomoides | Pale Yellow Mullein |
| Verbascum | bombyciferum | Silver Mullein |
| Verbascum | blattaria var. albiflorum | White Moth Mullein |
| Verbascum | x hybridum | White Spiked Mullein |
| Verbascum | thapsiforme | Wool Mullein |
| Verbena | hastata | Blue Vervain |
| Verbena | lappulaceae | Burry Vervain |
| Verbena | stricta | Hoary Vervain |
| Verbena | jamaicensis | Jamaica Vervain |
| Verbena | canadensis | Rose Verbena |
| Verbena | | Vervain |
| Verbena | officinalis | Vervain |
| Verbena | urticifolia | White Vervain |
| Vernonia | fasciculata | Ironweed |
| Vernonia | noveboracensis | Ironweed |
| Veronica | alpina | Alpine Speedwell |
| Veronica | americana | American veronica |
| Veronica | subsessilis | Bright Blue Speedwell |
| Veronica | beccabunga | Brooklime |
| Veronica | officinalis | Common Speedwell |
| Veronica | repens | Creeping Speedwell |
| Veronica | bellidioides | Dwarf Blue Speedwell |
| Veronica | triphyllos | Finger Speedwell |
| Veronica | gentianoides | Gentian Blue Speedwell |
| Veronica | chamaedrys | Germander Speedwell |
| Veronica | austriaca ssp.teucrium | Germander-leav Speedwell |
| Veronica | hederifolia | Ivy-leaved Speedwell |
| Veronica | longifolia | Long-leaved Speedwell |
| Veronica | scutellata | Marsh Speedwell |
| Veronica | agrestis | Procumbent Speedwell |
| Veronica | saxatilis | Rock Veronica |
| Veronica | incana | Silver Speedwell |
| Veronica | spicata | Spiked Speedwell |
| Veronica | serpyllifolia | Thyme-leaved Speedwell |
| Veronica | verna | Vernal Speedwell |
| Veronica | arvensis | Wall Speedwell |
| Veronicastrum | virginicum | Culver’s Root |
| Vetiveria | zizanioides | Vetiver Grass |
| Viburnum | prunifolium | Black-haw |
| Viburnum | plicatum | Doublefile Viburnum |
| Viburnum | opulus | Guelder Rose |
| Viburnum | sterile | Guelder Rose |
| Viburnum | trilobum | Highbush-cranberry |
| Viburnum | rhytidophyllum | Leatherleaf Viburnum |
| Viburnum | ellipticum | Oval-leaved viburnum |
| Viburnum | edule | Squashberry |
| Viburnum | lentago | Wild Raisin |
| Viburnum | cassinoides | Witherod |
| Vicia | faba | Fava Bean |
| Vigna | unguiculata | Asparagus Bean |
| Vigna | unguiculata var. sesquipedalis | Asparagus Bean |
| Vigna | aconitifolia | Moth Beans |
| Vigna | umbellata | Rice Bean |
| Vigna | mungo | Urdi Black Bean |
| Viminaria | denudata | Golden Spray |
| Vinca | major | Greater Periwinkle |
| Vinca | minor | Lesser Periwinkle |
| Vinca | | Periwinkle |
| Viola | pedata | Bird-foot Violet |
| Viola | dissecta var. chaerophylloides | Cutleaf Japanese Violet |
| Viola | canina | Dog Violet |
| Viola | hirta | Hairy Violet |
| Viola | tricolor | Heartsease |
| Viola | cornuta | Horned Violet |
| Viola | palustris | Marsh Violet |
| Viola | alba | Parma violet |
| Viola | odorata | Sweet Violet |
| Viola | | Violet |
| Viscum | album | Mistletoe |
| Vitex | trifolia | Three-leaved Chaste Tree |
| Vitex | agnus-castus | Vitex |
| Vitex | negundo | Vitex |
| Vitex | negundo var. heterophylla | Vitex |
| Vitis | californica | Californian Wild Grape |
| Vitis | cordifolia | Chickengrape |
| Vitis | | Grape |
| Vitis | riparia | Riverside Vine |
| Vitis | vinifera | Vine |
| Vitis | hederacea | Virginia Creeper |
| Vitis | labrusca | Wild Vine |
| Waltheria | glomerata | False Matico |
| Washingtonia | filifera | California Fan Palm |
| Weigela | florida | Weigela |
| Whipplea | modesta | Whipplevine |
| Wisteria | floribunda | Japanese Wisteria |
| Withania | somnifera | Ashwagandha |
| X Cupressocyparis | leylandii | Leyland Cypress |
| Xanthium | spinosum | Cocklebur |
| Xanthorroea | australis | Australian Grass Tree |
| Xanthoxylum | piperitum | Japanese prickly ash |
| Xeranthemum | | Immortelle |
| Xeranthemum | annuum | Immortelle |
| Xerophyllum | tenax | Bear-grass |
| Yucca | filamentosa | Adam’s Needle |
| Yucca | brevifolia | Joshua-tree |
| Yucca | elata | Soaptree |
| Yucca | aloifolia | Spanish Bayonet |
| Yucca | glauca | Spanish Bayonet |
| Yucca | whipplei | Spanish Bayonet |
| Yucca | baccata | Wild Date |
| Yucca | | Yucca |
| Zantedeschia | | Calla Lily |
| Zantedeschia | aethiopica | Common Calla Lily |
| Zanthoxylum | piperitum | Japan Pepper |
| Zanthoxylum | americanum | Prickly Ash |
| Zanthoxylum | clava-herculis | Prickly Ash |
| Zea | | Corn |
| Zea | diploperennis | Diploid Perennial Teosint |
| Zea | mays | Indian Corn |
| Zelkova | serrata | Japanese Zelkova |
| Zingiber | officinale | Ginger |
| Zingiber | fairchildii | Red Pine Cone Ginger |
| Zingiber | darceyi | Variegated Leaf Ginger |
| Zizania | aquatica | Wild Rice |
| Zizania | palustris | Wild Rice |
| Zizia | aurea | Golden Alexander’s |
| Zizyphus | sativa: | Chinese jujube |
| Zizyphus | vulgaris: | Chinese jujube |
| Zizyphus | zizyphus: | Chinese jujube |
| Zizyphus | jujuba | Jujube |
| Zizyphus | jujuba var. spinosa | Jujube |
| Zygadenus | venenosus | Meadow death-camas |
