172k | 190K | 160K | 123K | 145k | 120K | 158k | 169k |
| Buchu | Agathosma | betulina |
| Buchu | Barosma | betulina |
| Buchu | Barosma | crenulata |
| Buchu | Barosma | serratifolia |
| Buck Parsnip | Lomatium | triternaturm |
| Buck’s Horn Plantain | Plantago | coronopus |
| Buckthorn | Rhamnus | catharticus |
| Buckthorn | Rhamnus | frangula |
| Buckthorns | Rhamnus | |
| Buckwheat | Fagopyrum | esculentum |
| Buckwheat Bush | Eriogonum | |
| Buffalo Gourd | Cucurbita | foetidissima |
| Buffalo Grass | Hierochloe | odorata |
| Bugbane | Cimicifuga | |
| Bugleweed | Lycopus | virginicus |
| Bugloss | Anchusa | azurea |
| Bugloss | Anchusa | capensis |
| Bulbous Buttercup | Ranunculus | bulbosus |
| Bunch Flower | Melanthium | virginicum |
| Bunchberry | Cornus | canadensis |
| Bundle Flower | Desmanthus | |
| Burnet | Sanguisorba | |
| Burnet Rose | Rosa | spinosissima |
| Burnet Saxifrage | Pimpinella | saxifraga |
| Burning Bush | Dictamnus | albus |
| Burra Gookeroo | Pedalium | murex |
| Burr-Daisy | Calotis | erinacea |
| Burro’s tail | Sedum | morganianum |
| Burry Vervain | Verbena | lappulaceae |
| Bush Basil | Ocimum | minimum |
| Bush Bean | Phaseolus | vulgaris var. nanus |
| Bush Clover | Lespedeza | |
| Bush Cucumber | Mukia | micrantha |
| Bush Garbanzo Bean | Cicer | arietinum |
| Bush Honeysuckle | Lonicera | diervilla |
| Bush ladybell | Adenophora | potaninii |
| Bush-potato | Operculina | brownii |
| Butcher’s Broom | Ruscus | aculeatus |
| Butea Kino | Butea | frondosa |
| Butterbur | Petasites | vulgaris |
| Butterburr | Petasites | hybridus |
| Butterfly Bush | Buddleja | |
| Butterfly Flower | Schizanthus | |
| Butterfly Flower | Schizanthus | pinnatus |
| Butterfly ginger | Hedychium | coronarium |
| Butterfly Lobelia | Lobelia | |
| Butterfly-pea | Clitoria | ternatea |
| Butternut Squash | Cucurbita | moschata |
| Butterwort | Pinguicula | vulgaris |
| Button Snakeroot | Liatris | spicata |
| Button Snake-root | Eryngium | aquaticum |
| Cabbage | Brassica | |
| Cabbage | Brassica | oleracea |
| Cabbage | Brassica | oleracea var. capitata |
| Cabbage Palmetto | Sabal | palmetto |
| Cabbage Rose | Rosa | centifolia |
| Cabbage Tree | Andira | inermis |
| Cabbage Tree | Andira | retusa |
| Cabbage Tree | Avouacouapa | retusa |
| Cabello De Angel | Calliandra | anomala |
| Cacao | Theobroma | cacao |
| Cajeput | Melaleuca | decussata |
| Cajuput | Melaleuca | erucifolia |
| Cajuput | Melaleuca | hypericifolia |
| Cajuput | Melaleuca | lalifolia |
| Cajuput | Melaleuca | leucadendron |
| Cajuput | Melaleuca | minor |
| Cajuput | Melaleuca | veridifolia |
| Calabar Bean | Physostigma | venenosum |
| Calabash | Lagenaria | vulgaris |
| Calamint | Calamintha | officinalis: |
| Calamint | Calamintha | officinalis: |
| Calamint | Satureja | calamintha |
| Calamintha | Calamintha | ascendens |
| Calamondin Orange | Citrus | mitis |
| Calathea | Calathea | picturata |
| Calf’s Snout | Antirrhinum | orontium |
| Calico Plant | Aristolochia | elegans |
| California Bay | Umbellularia | californica |
| California Bayberry | Myrica | californica |
| California black oak | Quercus | kelloggii |
| California Buckeye | Aesculus | californica |
| California false hellebor | Veratrum | californicum |
| California Fan Palm | Washingtonia | filifera |
| California Huckleberry | Vaccinium | ovatum |
| California Pepper Tree | Schinus | molle |
| California Pitcher Plant | Darlingtonia | californica |
| California Poppy | Eschscholzia | |
| California Poppy | Eschscholzia | californica |
| California red fir | Abies | magnifica |
| California sagebrush | Artemisia | californica |
| California Snakeroot | Aristolochia | californica |
| California White Sage | Salvia | apiana |
| Californian Buckthorn | Rhamnus | purshianus |
| Californian Caraway | Perideridia | kelloggii |
| Californian Fire-Cracker | Brodiaea | ida-maia |
| Californian Lilac | Ceanothus | ‘Delight’ |
| Californian Lilac | Ceanothus | ‘Dignity’ |
| Californian Lilac | Ceanothus | ‘Gloire de Versailles’ |
| Californian Lilac | Ceanothus | ‘Topaz’ |
| Californian Lilac | Ceanothus | arboreus |
| Californian Lilac | Ceanothus | azurea |
| Californian Lilac | Ceanothus | impressus |
| Californian Lilac | Ceanothus | thyrsiflorus |
| Californian Nutmeg | Sorreya | californica |
| Californian Poison Oak | Rhus | diversilobe |
| Californian Poppy Bush | Dendromecon | rigidum |
| Californian Slippery Elm | Fremontia | californica |
| Californian Soaproot | Ornithogalum | divaricatum |
| Californian Spikenard | Aralia | californica |
| Californian White Cedar | Calocedrus | decurrens |
| Californian Wild Grape | Vitis | californica |
| Calla Lily | Zantedeschia | |
| Callery Pear | Pyrus | calleryana |
| Calotropis | Calotropis | gigantea |
| Calotropis | Calotropis | procera |
| Calumba | Jateorhiza | calumba |
| Camass | Camassia | |
| Camass | Camassia | esculenta: |
| Camel Thorn | Acacia | giraffae |
| camelthorn | Alhagi | pseudalhagi |
| Campernella | Narcissus | odorus |
| Camphor | Cinnamomum | camphora |
| Camphor | Cinnamomum | cinnamonum |
| Camphor Plant | Balsamita | vulgaris |
| Camphor Southernwood | Artemisia | camphorata |
| Camphor-rose Geranium | Pelargonium | x asperum ‘Camphoratum’ |
| Camphor-scented Basil | Ocimum | kilimandscharicum |
| Campion | Lychnis | |
| Campion | Lychnis | alpina |
| Campion | Silene | |
| Camwood | Baphia | nitida |
| Canacian Hemp | Apocynum | cannabinum |
| Canada Anemone | Anemone | canadensis |
| Canada garlic | Allium | canadense |
| Canada Milk Vetch | Astragalus | canadensis |
| Canada Tick-trefoil | Desmodium | canadense |
| Canada Wild Rye | Elymus | canadensis |
| Canadian Fleabane | Conyza | canadensis |
| Canahuate | Costus | guanaiensis |
| Canary Bird Vine | Tropaeolum | peregrinum |
| Canary Island Date Palm | Phoenix | canariensis |
| Canary-grass | Phalaris | canariensis |
| Cancer Wintergreen | Gaultheria | hispidula |
| Candelabra cactus | Euphorbia | lactea |
| Candelabrum Primrose | Primula | helodoxa |
| Candelilla Wax | Euphorbia | cerifera |
| Candlestick Senna | Cassia | alata |
| Canola | Brassica | campestris |
| Cantaloup Melon | Cucumis | cantalupensis |
| Canterbury Bells | Campanula | medium |
| Cape Aloë | Aloë | ferox |
| Cape Bladder Senna | Sutherlandia | |
| Cape Jasmine | Gardenia | jasminoides |
| Cape Pondweed | Aponogeton | distachyus |
| Caper | Capparis | spinosa |
| Caper Bush | Capparis | |
| Caper Bush | Capparis | spinosa var. inermis |
| Caper Spurge | Euphorbia | lathyrus |
| Caracao Sarsaparilla | Sarsaparilla | officinalis |
| Caraway | Carum | carvi |
| Caraway Thyme | Thymus | herba-barona |
| Cardinal Climber | Quamoclit | x sloteri |
| Cardinal Sage | Salvia | fulgens |
| Cardoon | Cynara | cardunculus |
| Cardoon | Cynara | cardunculus: |
| Cardoon Artichoke | Scolymus | cardunculus |
| Carline Thistle | Carlina | vulgaris |
| Carmine rose rock cress | Arabis | blepharophylla |
| Caroba | Jacaranda | procera |
| Caroba | Prosopis | dulcis |
| Caroba | Prosopis | siliquastrum |
| Carolina Allspice | Calycanthus | floridus |
| Carolina Lupin | Thermopsis | caroliniana |
| Carolina Silverbell | Halesia | carolina |
| Carpetweed | Mollugo | verticillata |
| Carragheen Moss | Gigartina | stellata |
| Carrot | Daucus | carota subsp. sativus |
| Carrots | Daucus | |
| Casca Paratuds | Cinnamodendron | axillaris |
| Cascade willow | Salix | cascadensis |
| Cascara Sagrada | Rhamnus | purshiana |
| Cascarilla | Croton | eleuteria |
| Cascarilla | Pogonopus | febrifugus |
| Cashew Nut | Anacardium | occidentale |
| Caspia Statice | Limonium | bellidifolium |
| Caspian Statice | Limonium | caspicum |
| Cassabanana | Sicana | odorifera |
| Cassia | Cinnamomum | aromaticum: |
| Cassia | Cinnamomum | cassia |
| Cassia Vera | Cinnamomum | tamala |
| Cast iron plant | Aspidistra | elatior |
| Castor Oil Plant | Ricinus | communis |
| Castus | Aplotaxis | auriculata |
| Cat Thyme | Teucrium | marum |
| Catfoot Everlasting | Gnaphalium | |
| Catmint | Mentha | cataria: |
| Catmint | Nepeta | cataria |
| Catsclaw | Acacia | greggii |
| Catsfoot | Antennaria | dioica |
| catspaw | Anigozanthos | humilis |
| Cattail | Typha | |
| Cattail | Typha | latifolia |
| Cat-thorn | Acacia | caffra |
| Cattleya orchid | Cattleya | |
| Caucasian Elecampane | Inula | orientalis |
| Cauliflower | Brassica | oleracea var. botrytis |
| Cayenne | Capsicum | minimum |
| Cedar | Cedrela | odorata |
| Cedar | Cedrus | |
| Cedar | Chamaecyparis | |
| Cedar | Thuja | |
| Cedar of Lebanon | Cedrus | libani |
| Cedar Sage | Salvia | roemeriana |
| Cedar Wattle | Acacia | elata |
| Cedrat Lemon | Citrus | medica cedra: |
| Cedron | Simaba | cedron |
| Cee-gwa | Luffa | acutangula |
| Celandine | Chelidonium | |
| Celeriac | Apium | graveolens var. rapaceum |
| Celery | Apium | graveolens |
| Celery Leaf Lovage | Ligusticum | apiifolium |
| Celery-leaved Crowfoot | Ranunculus | sceleratus |
| Centaury | Centaurium | erythraea |
| Centaury | Erythraea | acaulis |
| Centaury | Sabatia | campestris |
| Century Plant | Agave | |
| Cereus | Cereus | caespitosus |
| Cereus | Cereus | divaricatus |
| Cereus | Cereus | flagelliformis |
| Cereus | Cereus | pilocereus |
| Ceylon Agar-Agar | Gracillaria | lichenoides |
| Ceylon Moss | Fucus | amylaceus |
| Ceylon Wild Cardamoms | Elettaria | cardamomum var. major |
| Chaix Mullein | Verbascum | chaixii |
| Chamomile | Anthemis | |
| Chamomile-leaved Artemisi | Artemisia | chamaemelifolia |
| Chaparral | Larrea | tridentata |
| Chaparral Lily | Lilium | rubescens |
| Chapil | Crotalaria | longirostrata |
| Chapparal Morning Glory | Convolvulus | occidentalis |
| Chard | Beta | vulgaris var. vulgaris |
| Chaste Tree | Agnus | castus |
| Chaulmoogra | Taraktogenos | kurzii |
| Chaulmoogra tree | Hydnocarpus | anthelmintica |
| Cheddar Pink | Dianthus | gratianopolitanus |
| Cheken | Eugenia | cheken |
| Chenille Plant | Acalypha | hispida |
| Cherimoya | Asimina | triloba |
| Cherokee 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: |
| Cherry Birch | Betula | lenta |
| Cherry Laurel | Prunus | laurocerasus |
| Cherry Plum | Prunus | cerasifera |
| Cherry Tomato | Lycopersicon | pimpinellifolium |
| Chervil | Anthriscus | |
| Chervil | Anthriscus | cerefolium |
| Chervil | Scandix | cerefolium |
| Chia | Salvia | columbariae |
| Chia Sage | Salvia | hispanica |
| Chickengrape | Vitis | cordifolia |
| Chickweed | Stellaria | media |
| Chickweed Wintergreen | Trientalis | europaea |
| Chilacayote | Cucurbita | ficifolia |
| Chile | Capsicum | frutescens |
| Chile | Capsicum | pubescens |
| Chilean Evening Primrose | Oenothera | acaulis var. aurea |
| Chilean Fire Bush | Embothrium | coccineum |
| Chilean Glory Flower | Eccremocarpus | scaber |
| Chilean Jasmine | Mandevilla | suaveolens |
| Chilean Latern Tree | Crinodendron | hookerianum |
| Chilean Pine | Araucaria | araucana |
| Chili | Capsicum | frutescens f.piment |
| Chilian Centaury | Erythraea | chilensis |
| Chimney Bellflower | Campanula | pyramidalis |
| China Fleece Vine | Polygonum | aubertii |
| China grass | Boehmeria | nivea |
| China grass | Boehmeria | tenacissima: |
| China grass | Urtica | tenacissima: |
| China grass | Urtica | utilis: |
| China rose | Rosa | chinensis |
| China rose | Rosa | indica: |
| China rose | Rosa | sinica: |
| China Smilax | Smilax | china |
| China Smilax | Smilax | pseudo-china |
| Chinaberry tree | Melia | azedarach |
| Chinese angelica | Angelica | sinensis |
| Chinese Arbor Vitae | Thuja | orientalis |
| Chinese Arrowroot | Nelumbium | speciosum |
| Chinese Artichoke | Stachys | sieboldii |
| Chinese asparagus | Asparagus | cochinchinensis |
| Chinese Aster | Callistephus | chinensis |
| Chinese Banana | Musa | cavendishii |
| Chinese Broccoli | Brassica | alboglabra |
| Chinese Butterfly Bush | Buddleja | fallowiana |
| Chinese chive | Allium | odorum |
| Chinese Chives | Allium | tuberosum |
| Chinese Colli | Cordyline | terminalis |
| Chinese cucumber | Eopepon | aurantiacus: |
| Chinese cucumber | Eopepon | vitifolius: |
| Chinese Cucumber | Trichosanthes | japonica |
| Chinese Cucumber | Trichosanthes | kirilowii |
| Chinese cucumber | Trichosanthes | palmata: |
| Chinese Cucumber | Trichosanthes | rosthornii |
| Chinese Datura | Datura | ferox |
| Chinese Edelweiss | Leontopodium | souliei |
| Chinese Elm | Ulmus | chinensis |
| Chinese Fir | Cunninghamia | lanceolata |
| Chinese Foxglove | Rehmannia | elata |
| Chinese Hibiscus | Hibiscus | rosa-sinensis |
| Chinese hill haw | Crataegus | cuneata |
| Chinese Holly | Ilex | cornuta |
| Chinese Houses | Collinsia | heterophylla |
| Chinese jujube | Rhamnus | zizyphus: |
| Chinese jujube | Zizyphus | sativa: |
| Chinese jujube | Zizyphus | vulgaris: |
| Chinese jujube | Zizyphus | zizyphus: |
| Chinese Milkvetch | Astragalus | membranaceus |
| Chinese Mint | Mentha | haplocalyx |
| Chinese Motherwort | Leonurus | artemisia |
| Chinese Mustard | Brassica | juncea var. crispifolia |
| Chinese peony | Paeonia | albiflora |
| Chinese peony | Paeonia | edulis: |
| Chinese peony | Paeonia | lactiflora: |
| Chinese peony | Paeonia | officinalis Thunb.: |
| Chinese perennial Buckwh | Polygonum | cymosum |
| Chinese Pistache | Pistacia | chinensis |
| Chinese preserving melon | Benincasa | cerifera |
| Chinese preserving melon | Benincasa | hispida Cogn.: |
| Chinese preserving melon | Cucurbita | hispida: |
| Chinese preserving melon | Lagenaria | dasystemon: |
| Chinese Privet | Ligustrum | lucidum |
| Chinese quince | Chaenomeles | sinensis |
| Chinese quince | Cydonia | sinensis: |
| Chinese quince | Pirus | sinensis: |
| Chinese quince | Pseudocydonia | sinensis: |
| Chinese Rhubarb | Rheum | palmatum subsp. tanguticum |
| Chinese sumac | Rhus | javanica: |
| Chinese sumac | Rhus | osbeckii: |
| Chinese sumac | Rhus | semialata |
| Chinese Tallow | Sapium | sebiferum |
| Chinese trumpet-creeper | Bignonia | chinensis: |
| Chinese trumpet-creeper | Bignonia | grandiflora: |
| Chinese trumpet-creeper | Campsis | adrepens: |
| Chinese trumpet-creeper | Campsis | chinensis |
| Chinese trumpet-creeper | Incarvillea | grandiflora: |
| Chinese trumpet-creeper | Tecoma | grandiflora: |
| Chinese White Mulberry | Morus | alba |
| Chinese Winter Melon | Benincasa | hispida |
| Chinese Wolfberry | Lycium | barbarum |
| Chinese Wolfberry | Lycium | barbatum Thunb.: |
| Chinese wolfberry | Lycium | barbatum var. chinense: |
| Chinese Wolfberry | Lycium | chinense |
| Chinese Wolfberry | Lycium | megistocarpum: |
| Chinese Wolfberry | Lycium | ovatum: |
| Chinese Wolfberry | Lycium | trewianum: |
| Chinese Wolfberry | Lycium | turbinatum: |
| Chinese yam | Dioscorea | japonica |
| chinquapin | Castanopsis | chrysophylla |
| Chir Pine | Pinus | roxburghii |
| Chiretta | Swertia | chirata |
| Chives | Allium | schoenoprasum |
| Chocolate flower | Berlandiera | lyrata |
| Chocolate lily | Fritillaria | lanceolata |
| Chocolate-headed Clubrush | Eleocharis | quinqueflora |
| Chocolate-mint Geranium | Pelargonium | quercifolium ‘Chocolate-Mint’ |
| Choy Sum (Cantonese) | Brassica | parachinensis |
| Christmas cactus | Hatiora | gaertneri |
| Christmas Cactus | Schlumbergera | bridgesii |
| Christmas Cowslip | Pulmonaria | montana |
| Chufa | Cyperus | esculentus |
| Chufa | Cyperus | esculentus var. sativa |
| Cigar Flower | Cuphea | |
| Cigar Flower | Cuphea | llavea var. miniata ‘Firefly’ |
| Cinchona | Cinchona | calysaya |
| Cineraria | Senecio | x hybridus |
| Cinnamon | Cinnamomum | culiawan |
| Cinnamon | Cinnamomum | lignea |
| Cinnamon | Cinnamomum | loureirii |
| Cinnamon | Cinnamomum | obtusifolium: |
| Cinnamon | Cinnamomum | pauciflorum |
| Cinnamon | Cinnamomum | rubrum |
| Cinnamon | Cinnamomum | sintok |
| Cinnamon | Cinnamomum | zeylanicum |
| Cinnamon Cassia | Cinnamomum | aromaticum |
| Cinnamon Geranium | Pelargonium | crispum ‘Cinnamon’ |
| Cinnamon Yam | Dioscorea | batatas |
| Citron | Citrus | digitata seu chirocarpus: |
| Citron | Citrus | medica |
| Citron | Citrus | medica var. vulgaris |
| Citronella Grass | Cymbopogon | nardus |
| Citron-scented Gum | Eucalyptus | citriodora |
| Citrosa Geranium | Pelargonium | citrosum ‘Mosquito fighter’ |
| Citrus Fruits | Citrus | |
| Clary Sage | Salvia | sclarea |
| Clasping twistedstalk | Streptopus | amplexifolius |
| Clear Blue Catmint | Nepeta | nervosa |
| Clearing Nuts | Strychnos | pseudo |
| Clearweed | Pilea | pumila |
| Cleavers | Galium | aparine |
| Clematis | Clematis | recta |
| Cleveland Sage | Salvia | clevelandii |
| Cliff Bellflower | Campanula | tomasiniana |
| Climbing Brown Milkweed | Matelea | decipiens |
| Climbing Buckwheat | Polygonum | convolvulus |
| Climbing Hydrangea | Hydrangea | anomala |
| Clinker polypore | Inonotus | obligus |
| Clinker polypore | Poria | obliqua: |
| Clock Vine | Thunbergia | |
| Clorinda Geranium | Pelargonium | clorinda |
| Cloudberry | Rubus | chamaemorus |
| Clove Nutmeg | Agathophyllum | aromaticum |
| Clove Pink | Dianthus | caryophyllus |
| Clove tree | Caryophyllum | aromaticum: |
| Clove tree | Eugenia | caryophyllata |
| Clove-pink | Dianthus | caryophyllus ‘Grenadin’ |
| Clover Dodder | Cuscuta | trifolii |
| Cloves | Syzygium | aromaticum |
| Club-moss mountain heathe | Cassiope | lycopodioides |
| Cluster Bean | Cyamopsis | |
| Cluster Bean | Cyamopsis | tetragonoloba |
| Cluster cardamom | Amomum | cardamomum |
| Clustered bellflower | Campanula | glomerata |
| Clustered Dock | Rumex | conglomeratus |
| Clustered wild rose | Rosa | pisocarpa |
| Clusterhead Pink | Dianthus | carthusianorum |
| Coast Banksia | Banksia | integrifolia |
| Coast Redwood | Sequoia | sempervirens |
| Coastal Wattle | Acacia | sophorae |
| Coat Flower | Tunica | saxifraga |
| Cochineal | Dactylopius | coccus |
| Cochineal Insect Cactus | Opuntia | cochinellifera |
| Cocillana Bark | Guarea | rusbyi |
| Cockle | Vaccaria | |
| Cocklebur | Xanthium | spinosum |
| Cock’s Comb | Templetonia | retusa |
| Cockscomb | Celosia | argentea var. cristata |
| Cockscomb | Celosia | cristata |
| Cocksfoot-grass | Cynodon | dactylon |
| Cockspur Coral Tree | Erythrina | crista-gallii |
| Cockspur Thorn of EN Amer | Crataegus | crus-gallii |
| Coconut | Cocos | nucifera |
| Coconut Geranium | Pelargonium | grossularioides |
| Codonopsis | Codonopsis | tangshen |
| Coffee | Coffea | |
| Coffee | Coffea | arabica |
| Coffee Chicory | Cichorium | intybus ‘Magdeburg’ |
| Cola | Cola | acuminata |
| Colewort | Crambe | cordifolia |
| Colocynth | Citrullus | colocynthis |
| Colocynth | Cucumis | colocynthis |
| Colorado Blue Spruce | Picea | pungens |
| Colorado Fir | Abies | concolor |
| Coltsfoot | Tussilago | farfara |
| Columbia Lily | Lilium | columbianum |
| Columbine | Aquilegia | |
| Columbine | Aquilegia | hybr. |
| Columbine | Aquilegia | longissima |
| Columbine | Aquilegia | vulgaris |
| Columbo Weed | Coscinium | fenestratum |
| Colville’s Glory | Colvillea | racemosa |
| Combretum | Combretum | sundaicum |
| Comfrey | Symphytum | |
| Comfrey | Symphytum | grandiflorum |
| Comfrey | Symphytum | tuberosum |
| Common Alder | Alnus | glutinosa |
| Common Alkanet | Anchusa | officinalis |
| Common American Columbine | Aquilegia | canadensis |
| Common Barberry | Berberis | vulgaris |
| Common Birch | Betula | pendula |
| Common Bistort | Bistorta | major |
| Common bistort | Polygonum | bistorta |
| Common Buckthorn | Rhamnus | … |
| Common Bugle | Ajuga | reptans |
| Common Calla Lily | Zantedeschia | aethiopica |
| Common camas | Camassia | camas |
| Common Camass | Camassia | quamash |
| Common centaury | Centaurium | minus |
| Common centaury | Centaurium | umbellatum |
| Common Cichory | Cichorium | intybus var. sativum |
| Common Club Moss | Lycopodium | clavatum |
| Common Comfrey | Symphytum | officinale |
| Common Cord-grass | Spartina | stricta |
| Common Daisy | Bellis | perennis |
| Common Elm | Ulmus | procera |
| Common Fig | Ficus | carica |
| Common Fleabane | Inula | dysenterica |
| Common Forsythia | Forsythia | x intermedia |
| Common Fritillary | Fritillaria | meleagris |
| Common Granadilla | Passiflora | quadranguaris |
| Common Groundsel | Senecio | vulgaris |
| Common Hawthorn | Crataegus | monogyna |
| Common Hedge Mustard | Sisymbrium | officinale |
| Common Hemp Agrimony | Eupatorium | cannabinum |
| Common Ivy | Hedera | helix |
| Common ladybell | Adenophora | liliifolia |
| Common Lime | Tilia | vulgaris |
| Common Lungwort | Pulmonaria | officinalis |
| Common Maidenhair | Asplenium | trichomanes |
| Common Maple | Acer | campestre |
| Common Melon | Cucumis | melo |
| Common Moschatel | Adoxa | moschatellina |
| Common Mulberry | Morus | nigra |
| Common Oak | Quercus | pedunculata |
| Common Oak | Quercus | robur |
| Common Pennywort | Hydrocotyle | vulgaris |
| Common Plantain | Plantago | asiatica: |
| Common Plantain | Plantago | exaltata: |
| Common Plantain | Plantago | loureiri: |
| Common Plantain | Plantago | major |
| Common Plantain | Plantago | major var. asiatica: |
| Common Polypody | Polypodium | vulgare |
| Common Ray | Lolium | perenne |
| Common Reed | Phragmites | australis |
| Common rice | Oryza | sativa |
| Common Sage | Salvia | officinalis |
| Common Sandspurry | Arenaria | rubra |
| Common Scullcap | Scutellaria | galericulata |
| Common Scurvy Grass | Cochlearia | officinalis: |
| Common Sorrel | Rumex | acetosa |
| Common Sow-thistle | Sonchus | oleraceus |
| Common Speedwell | Veronica | officinalis |
| Common Spleenwort | Asplenium | ceterach |
| Common Star Thistle | Centaurea | calcitrapa |
| Common Stonecrop | Sedum | acre |
| Common Teazle | Dipsacus | sylvestris |
| Common Virgin’s Bower | Clematis | virginiana |
| Common wheat | Triticum | vulgare |
| Common White Jasmine | Jasminum | officinale |
| Common Whitebeam | Sorbus | aria |
| Common wintercress | Barbarea | vulgaris |
| Common Wintergreen | Pyrola | minor |
| Common Wormwood | Artemisia | absinthium |
| Compact harvest lily | Brodiaea | congesta |
| Compact Oregano | Origanum | vulgare ‘Compacta’ |
| Compass Plant | Silphium | laciniatum |
| Conchita | Centrosema | |
| Condurango | Gonolobus | condurango |
| Condurango | Marsdenia | condurango: |
| Conehead Thyme | Coridothymus | capitatus |
| confederate rose | Hibiscus | mutabilis |
| Congo Root | Psoralea | melilotoides |
| Contrayerva | Dorstenia | brasiliensis |
| Contrayerva | Dorstenia | contrayerva |
| Contrayerva | Dorstenia | drabena |
| Coolgardie Rose | Eucalyptus | macrocarpa |
| Coolwort | Tiarella | cordifolia |
| Cootamunda Wattle | Acacia | baileyana |
| Copaiba | Copaifera | |
| Copaiba | Copaifera | langsdorffii |
| Copalchi Bark | Cascarilla | esenbeckia febrifuga |
| Copalchi Bark (Mexico) | Croton | pseudo-china |
| Copper-Beech | Fagus | sylvatica var. purpurea |
| Copperbush | Cladothamnus | pyroliflorus |
| Coral Bead Vine | Abrus | precatorius |
| Coral Bells | Heuchera | sanguinea |
| Coral Bush | Templetonia | |
| Coral Tree | Erythrina | |
| Coral Tree | Erythrina | corallodendrum |
| Coral Vine | Antigonon | leptopus |
| Coralberry | Ardisia | crenata |
| Coriander | Coriandrum | sativum |
| Corkwing | Glehnia | littoralis |
| Corkwood Tree | Duboisia | myoporoides |
| Corn | Zea | |
| Corn Chamomile | Anthemis | arvensis |
| Corn Cockle | Agrostemma | |
| Corn Cockle | Agrostemma | githago |
| Corn Marigold | Chrysanthemum | segetum |
| Corn Melilot | Melilotus | arvensis |
| Corn Mint | Mentha | arvensis |
| Corn plant | Dracaena | fragrans |
| Corn Salad | Valerianella | locusta |
| Corn Sow-thistle | Sonchus | arvensis |
| Cornelian Cherry | Cornus | mas |
| Cornflower | Centaurea | |
| Cornflower | Centaurea | cyanus |
| Cornflower | Centaurea | cyanus ‘Emperor William’ |
| Cornish Heath | Erica | vagans |
| Cornu | Cola | ballayi |
| Corsican Mint | Mentha | requienii |
| Corsican Moss | Fucus | helminthocorton |
| Corsican Pearlwort | Sagina | subulata |
| Cosmea | Cosmos | bipinnatus |
| Costmary | Tanacetum | balsamita |
| Costus | Saussurea | lappa |
| Coto ? | Palicourea | densiflors |
| Cotoneaster | Cotoneaster | |
| Cotton | Gossypium | vitifolium |
| Cotton Grass | Eriophorum | angustifolium |
| Cotton Root | Gossypium | herbaceum |
| Couch-grass | Elymus | repens |
| Cow Parsley | Anthriscus | sylvestris |
| Cow Parsnip | Heracleum | |
| Cow Parsnip | Heracleum | lanatum |
| Cowcockle | Vaccaria | segetalis |
| Cowhage | Mucuna | pruriens |
| Cowherd | Saponaria | vaccaria |
| Cowslip | Primula | veris |
| Cowslip Lungwort | Pulmonaria | angustifolia |
| Cow-Wheat | Melampyrum | pratense |
| Crab Apple | Malus | sylvestris |
| Cranberry | Oxycoccus | microcarpus: |
| cranberry | Oxycoccus | palustris |
| Cranberry | Vaccinium | oxycoccus |
| Cranberry (Am.) | Vaccinium | macrocarpum |
| Cranesbill | Geranium | cinereum |
| Cranesbill | Geranium | dissectum |
| Cranesbill | Geranium | psilostemon |
| Cranesbill | Geranium | subcaulescens |
| Crapemyrtle | Lagerstroemia | indica |
| Crawley Root | Corallorrhiza | odontorhiza |
| Cream Gentian | Gentiana | flavida |
| Creamy Yarrow | Achillea | nobilis |
| Creeping Baby’s Breath | Gypsophila | repens |
| Creeping Bellflower | Campanula | rapunculoides |
| Creeping Germander | Teucrium | canadense |
| Creeping Gloxinia | Asarina | erubescens |
| Creeping lily-turf | Liriope | spicata |
| Creeping Plume Thistle | Carduus | arvensis |
| Creeping Sage | Salvia | repens |
| Creeping Savory | Satureja | repandra |
| Creeping snapdragon | Asarina | procumbens |
| Creeping Soft-grass | Holcus | mollis |
| Creeping Speedwell | Veronica | repens |
| Creeping Thyme | Thymus | praecox |
| Creeping Toadflax | Linaria | repens |
| Creeping willow | Salix | stolonifera |
| Creeping zinnia | Sanvitalia | procumbens |
| Creosote Bush | Larrea | |
| Crested Dog’s Tail | Cynosurus | cristatus |
| Crested Iris | Iris | cristata |
| Cretan Bear’s Tail | Celsia | arcturus |
| Crimson boronia | Boronia | heterophylla |
| Crimson Clover | Trifolium | incarnatum |
| Crimson Thyme | Thymus | praecox subsp. arcticus |
| Crimson Thyme | Thymus | praecox subsp. arcticus ‘Coccineus’ |
| Crisped mint | Mentha | crispa |
| Crisped Peppermint | Mentha | x piperita var. crispa |
| Crooked Yellow Stonecrop | Sedum | reflexum |
| Cross-leafed Heath | Erica | tetralix |
| Cross-leaved Gentian | Gentiana | cruciata |
| Crosswort | Crucianella | stylosa |
| Crosswort | Galium | cruciatum |
| Croton | Codiaeum | variegatum |
| Croton | Croton | tiglium |
| Crow Garlic | Allium | vineale |
| Crowberry | Empetrum | nigrum |
| Crown Imperial Lily | Fritillaria | imperialis |
| Crown Vetch | Coronilla | varia |
| Crucifixion thorn | Castela | emoryi |
| Cuban Oregano | Plectranthus | |
| Cuban Oregano | Plectranthus | amboinicus |
| Cubebs | Piper | cubeba |
| Cucumber | Cucumis | |
| Cucumber | Cucumis | sativus |
| Cudbear | Rocella | tinctoria |
| Cudweed | Graphalium | uliginosum |
| Culver’s Root | Veronicastrum | virginicum |
| Cumin | Cuminum | |
| Cumin | Cuminum | cyminum |
| Cup Moss | Cladonia | pyxidata |
| Cup Plant | Silphium | perfoliatum |
| Cup-and-saucer Vine | Cobaea | scandens |
| Cupid’s bower | Achimenes | hybrida |
| Cupid’s Dart | Catananche | caerulea |
| Curacoa Aloe | Aloë | chinensis |
| Curanja | Curanga | amara |
| Curare | Strychnos | toxifera |
| Cure-pire | Cyperus | sanguinea-fuscus |
| curled chervil | Anthriscus | cerefolium crispum |
| Curled Cress | Lepidium | sativum ‘Crispum’ |
| Curled Golden Marjoram | Origanum | aureum crispum |
| Curled Mallow | Malva | verticillata |
| Curled Mint | Mentha | spicata var. crispa |
| Curled Parsley | Petroselinum | crispum var. crispum |
| Curled Tansy | Tanacetum | vulgare ‘Crispum’ |
| Curling Everlasting | Helichrysum | scorpioides |
| Currants | Ribes | |
| Curry Leaf Plant | Murraya | koenigii |
| Curry Plant | Helichrysum | italicum |
| Cushion Spurge | Euphorbia | epithymoides |
| Custard Apple | Annona | glabra |
| Custard Apple | Annona | squamosa |
| Custard Apple | Annona | tripetala |
| Cutleaf boronia | Boronia | denticulata |
| Cutleaf Japanese Violet | Viola | dissecta var. chaerophylloides |
| Cutleaf Teasel | Dipsacus | laciniatus |
| Cycad | Cycas | pectinata |
| Cycad | Cycas | siamensis |
| Cyclamen | Cyclamen | persicum |
| Cymbidium orchid | Cymbidium | |
| Cypress | Cupressus | |
| Cypress asparagus fern | Asparagus | setaceus |
| Cypress Vine | Quamoclit | pennata |