| Cacalia | atriplicifolia | Pale Indian Plantain |
| Caesalpinia | | Brasiletto |
| Caesalpinia | ferrea | Leopard Tree |
| Caesalpinia | mexicana | Retamilia |
| Caesalpinia | sappan | Sappan-wood |
| Caesalpinia | pucherrima gilliesii | Yellow Bird of Paradise |
| Caladium | x hortulanum | Fancy-leaved caladium |
| Calamagrostis | canadensis | Bluejoint Grass |
| Calamintha | officinalis: | Calamint |
| Calamintha | officinalis: | Calamint |
| Calamintha | ascendens | Calamintha |
| Calamintha | nepeta | Nepitella |
| Calamintha | grandiflora | Showy Calamint |
| Calamintha | clinopodium | Wild Basil |
| Calamus | rotang | Sweet Segde |
| Calandrinia | umbellata | Rock Purslane |
| Calathea | picturata | Calathea |
| Calendula | officinalis var. prolifera | Hen and chicks pot marigo |
| Calendula | | Marigold |
| Calendula | officinalis | Pot Marigold |
| Calla | palustris | wild calla |
| Calliandra | anomala | Cabello De Angel |
| Callicarpa | | Beautyberry |
| Callicarpa | americana | French Mulberry |
| Callirhoe | triangulata | Poppy Mallow |
| Callirhoe | involucrata | Wine cups |
| Callistephus | chinensis | Chinese Aster |
| Callitris | preissii var. verrucosa | Mallee Pine |
| Callitris | preissii | Rottnest Is. Pine |
| Calluna | vulgaris | Heather |
| Calocasia | antiquorum | Taro |
| Calocedrus | decurrens | Californian White Cedar |
| Calochortus | | Mariposa Lilies |
| Calochortus | uniflorus | Mariposa Lily |
| Calochortus | nuttalii | Sego Lily |
| Calochortus | subalpinus | Subalpine mariposa lily |
| Calochortus | tolmiei | Tolmie’s mariposa lily |
| Calonyction | aculeatum | Giant Moonflower |
| Calonyction | | Moonflower |
| Calotis | cuneifolia | Bogan Flea |
| Calotis | erinacea | Burr-Daisy |
| Calotropis | gigantea | Calotropis |
| Calotropis | procera | Calotropis |
| Caltha | biflora | alpine white marsh marigo |
| Caltha | natans | floating marsh marigold |
| Caltha | | marsh marigold |
| Caltha | palustris | Marsh Marigold |
| Calutea | arborescens | Bladder Senna |
| Calycanthus | floridus | Carolina Allspice |
| Calycanthus | | Sweet Shrub |
| Calypso | bulbosa | Fairyslipper |
| Calystegia | sepium | Greater Bindweed |
| Camassia | | Camass |
| Camassia | esculenta: | Camass |
| Camassia | camas | Common camas |
| Camassia | quamash | Common Camass |
| Camassia | leichtlinii | Great camas |
| Camellia | japonica | Japanese Camellia |
| Camellia | sinensis | Tea |
| Camellia | bohea: | Tea plant |
| Camellia | theifera: | Tea plant |
| Camellia | viridis: | Tea plant |
| Campanula | elatines | Adriatic bellflower |
| Campanula | gentianoides: | Balloon flower |
| Campanula | glauca: | Balloon flower |
| Campanula | grandiflora: | Balloon flower |
| Campanula | barbata | Bearded Bellflower |
| Campanula | | Bellflower |
| Campanula | portenschlagiana | Bellflower |
| Campanula | x burghaltii | Bellflower |
| Campanula | zoysii | Bellflower |
| Campanula | collina | Blue dwarf bellflower |
| Campanula | medium | Canterbury Bells |
| Campanula | pyramidalis | Chimney Bellflower |
| Campanula | tomasiniana | Cliff Bellflower |
| Campanula | glomerata | Clustered bellflower |
| Campanula | rapunculoides | Creeping Bellflower |
| Campanula | garganica | Dwarf bellflower |
| Campanula | cochleariifolia | Fairies Thimbles |
| Campanula | latifolia var. macrantha | Giant Bellflower |
| Campanula | latifolia | Great Bellflower |
| Campanula | rotundifolia | Harebell |
| Campanula | glomerata var. acaulis | Low Cluster Danesblood Be |
| Campanula | lactiflora | Milky Bellflower |
| Campanula | persicifolia | Peach-leaved Bellflower |
| Campanula | poscharskyana | Poscharsky’s Bellflower |
| Campanula | rapunculus | Rampion |
| Campanula | tridentata | Toothed Bellflower |
| Campanula | carpatica | Tussock Bellflower |
| Campanula | alliariifolia | White bellflower |
| Campanula | pyramidalis var. alba | White Chimney Bellflower |
| Campanula | thyrsoides | Yellow Bellflower |
| Campsis | adrepens: | Chinese trumpet-creeper |
| Campsis | chinensis | Chinese trumpet-creeper |
| Campsis | grandiflora | Trumpet Creeper |
| Campsis | radicans | Trumpet Creeper |
| Campsis | x tagliabuana | Trumpet Creeper |
| Campsis | | Trumpet Vine |
| Canavalia | maritima | Baybean |
| Canavalia | ensiformis | Jack Bean |
| Candelariella | vitellina | Lichen |
| Canella | axillaris | Malambo Bark |
| Canella | alba | White Cinnamon |
| Canna | edulis | Indian Shot |
| Canna | indica | Indian Shot |
| Cannabis | chinense: | Hemp |
| Cannabis | sativa | Indian Hemp |
| Capparis | spinosa var. nummularia | Australian Caper-bush |
| Capparis | spinosa | Caper |
| Capparis | | Caper Bush |
| Capparis | spinosa var. inermis | Caper Bush |
| Capsella | bursa-pastoris | Shepherd’s Purse |
| Capsicum | pendulum | Aji Colorado Chile |
| Capsicum | baccatum | Aji Habanero Chile |
| Capsicum | minimum | Cayenne |
| Capsicum | frutescens | Chile |
| Capsicum | pubescens | Chile |
| Capsicum | frutescens f.piment | Chili |
| Capsicum | annuum | Peppers |
| Caragana | | Pea Tree |
| Caragana | arborescens | Siberian Peashrub |
| Cardamine | hirsuta | Hairy Bittercress |
| Cardamine | pratensis | Lady’s Smock |
| Cardamine | amara | Larger Bittercress |
| Cardiocrinum | giganteum | Giant Lily |
| Cardiospermum | halicacabum | Balloon vine |
| Cardispermum | halicacabum | Balloon Vine |
| Carduus | arvensis | Creeping Plume Thistle |
| Carduus | palustris | Marsh Plume Thistle |
| Carduus | pratensis | Meadow Plume Thistle |
| Carduus | heterophyllus: | Melancholy Thistle |
| Carduus | nutans | Musk Thistle |
| Carduus | pycnocephalous | Slender-flowered Thistle |
| Carduus | lanceolatus | Spear Thistle |
| Carduus | tuberosus | Tuberous Plume Thistle |
| Carduus | crispus | Welted Thistle |
| Carduus | eriophorus | Woolly-headed Thistle |
| Carex | bebbii | Bebb’s Sedge |
| Carex | vulpinoidea | Fox Sedge |
| Carex | pendula | Giant Sedge Grass |
| Carex | vulpina | Great Sedge |
| Carex | grayi | Morning Star |
| Carex | trifida | Mutton Bird Sedge |
| Carex | pennsylvanica | Pennsylvania Sedge |
| Carex | arenaria | Sand Sedge |
| Carica | pentagona | babáco |
| Carica | | Papaya |
| Carica | papaya | Papaya |
| Carica | papaya ‘Hawaii Dark Pink’ | Papaya |
| Carica | papaya ‘Solo’ | Papaya |
| Carissa | grandiflora | Natal Plum |
| Carlina | acanthifolia | Acanthus-leaved Thistle |
| Carlina | vulgaris | Carline Thistle |
| Carlina | acaulis | Dwarf Thistle |
| Carlina | | Weather thistle |
| Carnegiea | gigantea | Saguaro Cactus |
| Carpinus | betulus | European Hornbeam |
| Carthamus | tinctorius | Safflower |
| Carum | copticum | Ajowan |
| Carum | copti | Ajwan |
| Carum | carvi | Caraway |
| Caryophyllum | aromaticum: | Clove tree |
| Cascarilla | esenbeckia febrifuga | Copalchi Bark |
| Cassia | holosericeae | Aden Senna |
| Cassia | marilandica | American Senna |
| Cassia | javanica | Apple-blossom Shower |
| Cassia | alata | Candlestick Senna |
| Cassia | sturtii | Dense senna |
| Cassia | eremophila | Desert Cassia |
| Cassia | covesii | Desert senna |
| Cassia | tomentosa | Downy Senna |
| Cassia | montana | False Senna |
| Cassia | corymbosa | Flowery Senna |
| Cassia | odorata | Fragrant senna |
| Cassia | gaudichaudii | Kalamona |
| Cassia | glauca | Kalamona |
| Cassia | nodosa | Pink And White Shower |
| Cassia | grandis | Pink Shower |
| Cassia | didymobotra | Popcorn Senna |
| Cassia | chamoecrista | Prairie Senna |
| Cassia | fistula | Purging Cassia |
| Cassia | obovata | Senegal Senna |
| Cassia | | Senna |
| Cassia | acutifolia | Senna |
| Cassia | tora | Sickle senna |
| Cassia | laevigata | Smooth Senna |
| Cassia | angustifolia | Tinevelly Senna |
| Cassia | hebecarpa | Wild Senna |
| Cassia | nictitans | Wild Sensitive Plant |
| Cassia | artemisioides | Wormwood Senna |
| Cassiope | stelleriana | Alaskan mountain-heather |
| Cassiope | lycopodioides | Club-moss mountain heathe |
| Cassiope | mertensiana | White mountain-heather |
| Castanea | sativa | Sweet Chestnut |
| Castanopsis | chrysophylla | chinquapin |
| Castela | emoryi | Crucifixion thorn |
| Castilleja | | Indian Paintbrush |
| Castilleja | integra | Indian Paintbrush |
| Casuarina | cristata | Belah |
| Casuarina | cunninghamiana | River She-oak |
| Casuarina | | She-oak |
| Catabrosa | aquatica | Water Whorl-grass |
| Catalpa | bignonioides | Indian Bean Tree |
| Catalpa | ovata | Yellow Catalpa |
| Catananche | caerulea | Cupid’s Dart |
| Catechu | nigrum | Black Catechu |
| Catechu | pallidum | Pale Catechu |
| Catha | edulis | Khat |
| Catharanthus | roseus | Madagascar Periwinkle |
| Cattleya | | Cattleya orchid |
| Caulophyllum | thalictroides | Blue Cohosh |
| 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 Lilac |
| Ceanothus | cordulatus | Mountain Whitethorn |
| Ceanothus | americanus | Red Root |
| Ceanothus | sanguineus | Redstem ceanothus |
| Ceanothus | velutinus | Snowbrush |
| Ceanothus | chloroxylon | West Indian Logwood |
| Cedrela | tooma | Australian Red Cedar |
| Cedrela | odorata | Cedar |
| Cedronella | triphylla | Balm of gilead |
| Cedronella | canariensis | Balm of Gilead (Fake) |
| Cedronella | triphylla: | False Balm of Gilead |
| Cedrus | atlantica | African Cedar |
| Cedrus | | Cedar |
| Cedrus | libani | Cedar of Lebanon |
| Cedrus | deodara | Indian Cedar |
| Celastrus | scandens | American Bittersweet |
| Celastrus | orbiculatus | Oriental Bittersweet |
| Celastrus | alatus: | Winged spindle-tree |
| Celastrus | striatus: | Winged spindle-tree |
| Celosia | argentea var. cristata | Cockscomb |
| Celosia | cristata | Cockscomb |
| Celosia | plumosa | Plumed cockscomb |
| Celosia | argentea | Quail Grass |
| Celosia | | Wheatstraw Celosia |
| Celosia | spicata | Wheatstraw celosia |
| Celsia | arcturus | Cretan Bear’s Tail |
| Celsia | roripifolia | Pink Bear’s Tail |
| Centaurea | americana ‘Jolly Joker’ | Basket Flower |
| Centaurea | nigra | Black Knapweed |
| Centaurea | calcitrapa | Common Star Thistle |
| Centaurea | | Cornflower |
| Centaurea | cyanus | Cornflower |
| Centaurea | cyanus ‘Emperor William’ | Cornflower |
| Centaurea | scabiosa | Greater Knapweed |
| Centaurea | jacea | Knapwort Harshweed |
| Centaurea | montana | Mountain Knapweed |
| Centaurea | pulcherrima | Pink Knapweed |
| Centaurea | moschata | Sweet Sultan |
| Centaurea | phrygia | Wig Knapweed |
| Centaurea | solstitalis | Yellow Star Thistle |
| Centaurea | macrocephala | Yellow Thistle |
| Centaurium | erythraea | Centaury |
| Centaurium | minus | Common centaury |
| Centaurium | umbellatum | Common centaury |
| Centranthus | ruber | Red Valerian |
| Centrosema | | Conchita |
| Centrosema | virginiana | Spurred Butterfly Pea |
| Cephaëlis | ipecacuanha | Ipecacuanha |
| Cephalaria | gigantea | Golden Scalehead |
| Cephalocereus | senilis | The Old Man Cactus |
| Ceradia | furcata | African Bdellium |
| Cerastium | | Mouse Ear |
| Cerastium | biebersteinii | Mouse-eared Chickweed |
| Cerastium | grandiflorum | Showy Chickweed |
| Cerastium | tomentosum | Snow In Summer |
| Ceratonia | siliqua | John’s Bread |
| Ceratostigma | plumbaginoides | Plumbago |
| Ceratostigma | willmottianum | Plumbago |
| Cercidiphyllum | japonicum | Katsura Tree |
| Cercidium | | Palo Verde |
| Cercidium | microphyllum | Yellow Paloverde |
| Cercis | siliquastrum | Judas Tree |
| Cercis | canadensis | North America Red Bud |
| Cercis | | Redbud |
| Cercis | occidentalis | Western Red Bud |
| Cercocarpus | betuloides | Birch-leaf Mountain Mahog |
| Cercocarpus | | Mountain Mahogany |
| Cereus | caespitosus | Cereus |
| Cereus | divaricatus | Cereus |
| Cereus | flagelliformis | Cereus |
| Cereus | pilocereus | Cereus |
| Cereus | grandiflorus | Night Blooming Cereus |
| Cereus | giganteus | Suwarron |
| Cerinthe | major | honeywort |
| Cestrum | nocturnum | Night-blooming Jasmine |
| Cetraria | islandica | Iceland Moss |
| Chaenactis | | pincushion |
| Chaenomeles | sinensis | Chinese quince |
| Chaenomeles | japonica | Japanese Quince |
| Chaenomeles | speciosa | Ornamental Quince |
| Chaenomeles | x superba | Ornamental Quince |
| Chaerophyllum | bulbosum | Parsnip Chervil |
| Chamaecereus | silvestrii | Peanut Cactus |
| Chamaecyparis | | Cedar |
| Chamaecyparis | obtusa | Hinoki |
| Chamaecyparis | lawsoniana | Lawson Cypress |
| Chamaecyparis | pisifera | Sawara Falsecypress |
| Chamaecyparis | nootkatensis | Yellow-cedar |
| Chamaedorea | erumpens | Bamboo Palm |
| Chamaelirium | luteum | False Unicorn Root |
| Chamaemelum | nobile ‘Treneague’ | English Chamomile |
| Chamaemelum | nobile | Roman Chamomille |
| Chamaenerion | angustifolium | Fireweed |
| Chamaepeuce | diacantha | Fish-bone Thistle |
| Chamaerops | excelsa: | Hemp palm |
| Chavica | roxburghii: | Long pepper |
| Cheiranthus | | Wallflower |
| Cheiranthus | cheiri | Wallflower |
| Chelidonium | | Celandine |
| Chelidonium | majus | Greater Celandine |
| Chelone | obliqua | Balmony |
| Chelone | glabra | Turtlehead |
| Chenopodium | botrys ‘Green Magic’ | Ambrosia |
| Chenopodium | ambrosioides | American Wormseed |
| Chenopodium | anthelminticum | American Wormseed |
| Chenopodium | olidum | Arrach |
| Chenopodium | scoparia: | Belvedere cypresss |
| Chenopodium | album | Fat Hen |
| Chenopodium | bonus-henricus | Good King Henry |
| Chenopodium | amaranticolor | Goosefoot |
| Chenopodium | | Goosefoots |
| Chenopodium | botrys | Jerusalem Oak |
| Chenopodium | giganteum | Magenta Lamb’s Quarters |
| Chenopodium | murale | Nettle-leaved Goosefoot |
| Chenopodium | glaucum | Oak-leaved Goosefoot |
| Chenopodium | quinoa | Quinoa |
| Chenopodium | rubrum | Red Goosefoot |
| Chenopodium | aristatum | Sea Foam Flower |
| Chenopodium | capitatum | Strawberry Blite |
| Chiastophyllum | oppositifolium | Lamb’s Tail |
| Chilopsis | linearis | Desert Willow |
| Chimaphila | umbellata | Pipissewa |
| Chimaphila | | Pipsissewa |
| Chimaphila | maculata | Spotted Wintergreen |
| Chimonanthus | praecox | Wintersweet |
| Chimophila | umbellata | Pipissewa |
| Chionanthus | virginicus | Fringe Tree |
| Chionanthus | virginucus | White Fringetree |
| Chionodoxa | luciliae | Glory of The Snow |
| Chlorogalum | | Amole Lily |
| Chlorogalum | pomeridianum | Amole Lily |
| Chlorophytum | comosum | Spider Plant |
| Choisya | ternata | Mexican Orange Blossom |
| Chondrodendron | tomentosum | Pareira |
| Chondrus | crispus | Irish Moss |
| Chrysalidocarpus | lutescens | Areca palm |
| Chrysanthemum | segetum | Corn Marigold |
| Chrysanthemum | coronarium | Garland Chrysanthemum |
| Chrysanthemum | leucanthemum | Oxeye Daisy |
| Chrysanthemum | carneum | Persian Pellitory |
| Chrysanthemum | roseum | Persian Pellitory |
| Chrysanthemum | cinerariifolium | Pyrethrum |
| Chrysanthemum | x superbum | Shasta Daisy |
| Chrysanthemum | ptarmiciflorum | Silverlace Dusty Miller |
| Chrysanthemum | suaveolens | Sweet Feverfew |
| Chrysanthemum | vulgare | Tansy |
| Chrysanthemum | macrophyllum | Tansy Chrysanthemum |
| Chrysophyllum | cainito | Star Apple |
| Chrysopsis | villosa | Aster |
| Chrysopsis | | Golden Aster |
| Chrysopsis | mariana | Maryland Golden Aster |
| Chrysopsis | camporum | Rosinwood |
| Chrysosplenium | oppositifolium | Golden Saxifrage |
| Cicer | arietinum | Bush Garbanzo Bean |
| Cichorium | intybus ‘Magdeburg’ | Coffee Chicory |
| Cichorium | intybus var. sativum | Common Cichory |
| Cichorium | endivia | Endive |
| Cichorium | endiva | Endive Chicory |
| Cichorium | intybus | Wild Chicory |
| Cicuta | maculata | American Cowbean |
| Cicuta | douglasii | poison hemlock |
| Cicuta | mackenzieana | water hemlock |
| Cicuta | virosa | Water Hemlock |
| Cimicifuga | elata | Black Cohosh |
| Cimicifuga | racemosa | Black Cohosh |
| Cimicifuga | | Bugbane |
| Cinchona | calysaya | Cinchona |
| Cinchona | succirubra | Peruvian Bark |
| Cinnamodendron | axillaris | Casca Paratuds |
| Cinnamodendron | corticosum | False Winter’s Bark |
| Cinnamomum | camphora | Camphor |
| Cinnamomum | cinnamonum | Camphor |
| Cinnamomum | aromaticum: | Cassia |
| Cinnamomum | cassia | Cassia |
| Cinnamomum | tamala | Cassia Vera |
| Cinnamomum | culiawan | Cinnamon |
| Cinnamomum | lignea | Cinnamon |
| Cinnamomum | loureirii | Cinnamon |
| Cinnamomum | obtusifolium: | Cinnamon |
| Cinnamomum | pauciflorum | Cinnamon |
| Cinnamomum | rubrum | Cinnamon |
| Cinnamomum | sintok | Cinnamon |
| Cinnamomum | zeylanicum | Cinnamon |
| Cinnamomum | aromaticum | Cinnamon Cassia |
| Cinnamomum | nitidum | Malabathri Leaves |
| Cinnamomum | burmanni | Massoi Bark |
| Cinnamomum | iners | Wild Cinnamon (Japan) |
| Circaea | lutetiana | Enchanter’s Nightshade |
| Cirsium | diacantha | Fishbone Thistle |
| Cirsium | japonicum | Japanese Thistle |
| Cirsium | helenioides | Melancholy Thistle |
| Cissampelos | convolulaceum | Wild Grape |
| Cissus | antarctica | Kangaroo Vine |
| Cistus | laurifolius | Laurel-leaved Rock Rose |
| Cistus | | Rock Rose |
| Cistus | ladaniferus | Rock Rose |
| Cistus | x pulverulentus | Rock Rose |
| Cistus | x purpureus | Rock Rose |
| Cistus | salviifolius | Sage-leaved Rockrose |
| Citrullus | colocynthis | Colocynth |
| Citrullus | edulis: | Watermelon |
| Citrullus | lanatus | Watermelon |
| Citrullus | vulgaris | Watermelon |
| Citrus | bergamia | Bergamot |
| Citrus | vulgaris var. bigaradia | Bitter Orange |
| Citrus | mitis | Calamondin Orange |
| Citrus | medica cedra: | Cedrat Lemon |
| Citrus | digitata seu chirocarpus: | Citron |
| Citrus | medica | Citron |
| Citrus | medica var. vulgaris | Citron |
| Citrus | | Citrus Fruits |
| Citrus | x paradisi | Grapefruit |
| Citrus | javanica | Java Lemon |
| Citrus | hystrix | Kaffir Lime |
| Citrus | deliciosa: | King orange |
| Citrus | nobilis | King orange |
| Citrus | limon | Lemon |
| Citrus | aurantiifolia | Lime Fruit |
| Citrus | sinensis | Orange |
| Citrus | limetta: | Pear Lemon |
| Citrus | margarita | Pearl Lemon |
| Citrus | aurantium | Seville Orange |
| Citrus | lumia | Sweet Lemon |
| Citrus | aurantium var. dulcis | Sweet Orange |
| Citrus | trifoliata: | Trifoliate orange |
| Citrus | triptera: | Trifoliate orange |
| Cladonia | pyxidata | Cup Moss |
| Cladothamnus | pyroliflorus | Copperbush |
| Cladrastis | kentukea | American Yellowwood |
| Clarkia | unguiculata | Mountain Garland |
| Claytonia | perfoliata | Winter Purslane |
| Clematis | crispa | Blue Jasmine |
| Clematis | recta | Clematis |
| Clematis | virginiana | Common Virgin’s Bower |
| Clematis | connata | Gold Nod Clematis |
| Clematis | tangutica | Golden Clematis |
| Clematis | viticella | Italian Vine Bower |
| Clematis | x jackmanii | Jackman Clematis |
| Clematis | viorna | Leather Flower |
| Clematis | paniculata | Sweet Autumn Clematis |
| Clematis | flammula | Sweet-scented Virgin’s B |
| Clematis | vitalba | Traveller’s Joy |
| Clematis | | Virgin’s Bower |
| Clematis | ligusticifolia | Yerba De Chivato |
| Cleome | | Spider Flower |
| Cleome | hasslerana | Spider Flower |
| Cleome | spinosa | Spider Flower |
| Clethra | alnifolia | Sweet Pepper Bush |
| Clianthus | | Glory Pea |
| Clianthus | formosus | Glory Pea |
| Clianthus | puniceus | Parrot’s Bill |
| Clinopodium | vulgare | Wild Basil |
| Clinopodium | vulgare: | Wild Basil |
| Clintonia | uniflora | Queen’s cup |
| Clitoria | ternatea | Butterfly-pea |
| Clivia | miniata | Kaffir Lily |
| Clusia | flava | Monkey Apple |
| Cnicus | benedictus | Holy Thistle |
| Cobaea | scandens | Cup-and-saucer Vine |
| Coccoloba | uvifera | Jamaica Kino |
| Cochlearia | officinalis: | Common Scurvy Grass |
| Cochlearia | danica | Danish Scurvy-grass |
| Cochlearia | anglica | English Scurvy-grass |
| Cochlearia | fenestrata | Scurvy Grass |
| Cocos | nucifera | Coconut |
| Codiaeum | variegatum | Croton |
| Codonopsis | tangshen | Codonopsis |
| Coffea | canephora | Australian Sandarac |
| Coffea | | Coffee |
| Coffea | arabica | Coffee |
| Coix | lachryma-jobi | Job’s Tears |
| Cola | acuminata | Cola |
| Cola | ballayi | Cornu |
| Cola | vera | Kola Nuts |
| Colchicum | | Autumn Crocus |
| Colchicum | autumnale | Meadow Saffron |
| Coleus | amboinicus | Broadleaf Thyme |
| Coleus | | Menthol Plant |
| Collinsia | heterophylla | Chinese Houses |
| Collinsia | canadensis | Stoneroot |
| Collinsonia | canadensis | Stone Root |
| Colocasia | esculenta | Elephant Ears |
| Colutea | arborescens | Bladder-senna |
| Colvillea | racemosa | Colville’s Glory |
| Combretum | sundaicum | Combretum |
| Commelina | | Dayflower |
| Commelina | tuberosa | Dayflower |
| Commiphora | opobalsamum | Balsam of Gilead |
| Commiphora | erythraea | Bisabol Myrrh |
| Commiphora | myrrha | Myrrh |
| Conium | maculatum | Poison Hemlock |
| Conopholis | alpina | broomrape |
| Conopodium | majus | Pig-nut |
| Consolida | regalis | Field Larkspur |
| Consolida | | Larkspur |
| Consolida | ajacis | Larkspur |
| Consolida | orientalis | Larkspur |
| Convallaria | majalis | Lily of The Valley |
| Convolvulus | dissectus | Bindweed |
| Convolvulus | purpureus | Bindweed |
| Convolvulus | rhodorhiza | Bindweed |
| Convolvulus | | Bindweeds |
| Convolvulus | occidentalis | Chapparal Morning Glory |
| Convolvulus | tricolor | Dwarf Convolvulus |
| Convolvulus | arvensis | Field Convolvulus |
| Convolvulus | jalapa | Jalap Bindweed |
| Convolvulus | duartinus | Morning Glory |
| Convolvulus | soldanella | Sea Bindweed |
| Convolvulus | scammonia | Syrian Bindweed |
| Convolvulus | batatas | Tuberous-rooted Bindweed |
| Convolvulus | panduratus | Wild Potato |
| Conyza | canadensis | Canadian Fleabane |
| Conyza | carminifolia | Moradilla |
| Copaifera | | Copaiba |
| Copaifera | langsdorffii | Copaiba |
| Coplospermum | gossypium | Indian Gum |
| Coptis | groenlandica | Goldthread |
| Coptis | trifolia | Goldthread |
| Corallorrhiza | odontorhiza | Crawley Root |
| Corallorrhiza | maculata | Spotted coralroot |
| Corallorrhiza | striata | Striped coralroot |
| Corallorrhiza | maculata ssp. mertensiana | Western coralroot |
| Cordyline | terminalis | Chinese Colli |
| Cordyline | australis | New Zealand Cabbage Tree |
| Coreopsis | tinctoria | Dyer’s Coreopsis |
| Coreopsis | gigantea | Giant Coreopsis |
| Coreopsis | palmata | Stiff Coreopsis |
| Coreopsis | tripteris | Tall Coreopsis |
| Coreopsis | grandiflora | Tickweed |
| Coreopsis | lanceolata | Tickweed |
| Coriandrum | sativum | Coriander |
| Coridothymus | capitatus | Conehead Thyme |
| Cornus | florida | American Boxwood |
| Cornus | canadensis | Bunchberry |
| Cornus | mas | Cornelian Cherry |
| Cornus | sanguinea | Dogberry |
| Cornus | caerulea | Dogwood |
| Cornus | mascula | Dogwood |
| Cornus | suecica | Dogwood |
| Cornus | circinata | Green Osier |
| Cornus | kousa | Kousa Dogwood |
| Cornus | amomum | Red American Osier |
| Cornus | alba | Red-barked Dogwood |
| Cornus | stolonifera | Red-osier dogwood |
| Cornus | nuttallii | Western flowering dogwood |
| Coronilla | varia | Crown Vetch |
| Coronilla | emerus | Scorpion Senna |
| Cortaderia | selloana | White Pampas Grass |
| Cortusa | matthioli | Bear’s Ear Sanicle |
| Corydalis | cuccularia | Dutchman’s Breeches |
| Corylus | californica: | beaked hazelnut |
| Corylus | cornuta var. californica | Beaked hazelnut |
| Corylus | maxima | Giant Hazel |
| Corylus | avellana | Hazel |
| Corylus | colurna | Turkish Hazel |
| Coscinium | fenestratum | Columbo Weed |
| Cosmos | bipinnatus | Cosmea |
| Cosmos | | Mexican Aster |
| Costus | guanaiensis | Canahuate |
| Costus | | Spiral Flag |
| Costus | speciosus | Spiral Ginger |
| Cotinus | americanus | Smoke Tree |
| Cotinus | coggygria | Venetian Sumach |
| Cotoneaster | | Cotoneaster |
| Cotula | turbinata | Brass Buttons |
| Cotula | barbata | Yellow Marbles |
| Cotyledon | umbilicus | Kidneywort |
| Cotyledon | | Pig’s Ears |
| Crambe | cordifolia | Colewort |
| Crambe | maritima | Sea Kale |
| Crambe | tatarica | Tatarican Colewort |
| Craspedia | globosa | Golden Drumstick |
| Crataegus | douglasii | Black hawthorn |
| Crataegus | cuneata | Chinese hill haw |
| Crataegus | crus-gallii | Cockspur Thorn of EN Amer |
| Crataegus | monogyna | Common Hawthorn |
| Crataegus | laevigata | Hawthorn |
| Crataegus | oxyacantha | hawthorn |
| Crataegus | | Hawthorns |
| Crataegus | bibas: | Loquat |
| Crataegus | oxyacanthoides | Midland Hawthorn |
| Crataegus | phaenopyrum | Washington Hawthorne |
| Crepis | rubra | Hawk’s Beard |
| Crinodendron | hookerianum | Chilean Latern Tree |
| Crithmum | maritimum | Rock Samphire |
| Crocosmia | x crocosmiiflora | Garden Montbretia |
| Crocus | sativus | Saffron |
| Crotalaria | longirostrata | Chapil |
| Crotalaria | cunninghamii | Green Bird Flower |
| Crotalaria | tenuifolia | Jubbulpore Hemp |
| Crotalaria | | Rattle Box |
| Crotalaria | juncea | Sunn Hemp |
| Croton | sanguifolius | .. (New Andalusia) |
| Croton | hibiscifolius | .. (New Granada) |
| Croton | eleuteria | Cascarilla |
| Croton | pseudo-china | Copalchi Bark (Mexico) |
| Croton | tiglium | Croton |
| Croton | draco | Mexican Dragon’s Blood |
| Croton | cascarilla | Wild Rosemary |
| Crowea | angustifolia var. dentata | Narrow Leaf |
| Crucianella | stylosa | Crosswort |
| Cryptocarpus | spiralis | East Indian Ipecacuanha |
| Cryptomeria | japonica | Japanese Cedar |
| Cryptotaenia | canadensis | Japanese Parsley |
| Cryptotaenia | japonica | Japanese Parsley |
| Cucumis | prophetarum | .. (Arabia) |
| Cucumis | myriocarpus | .. (South Africa) |
| Cucumis | metuliferus | African Cucumber |
| Cucumis | melo var. flexuosus | Armenain Yard Long Cucumb |
| Cucumis | cantalupensis | Cantaloup Melon |
| Cucumis | colocynthis | Colocynth |
| Cucumis | melo | Common Melon |
| Cucumis | | Cucumber |
| Cucumis | sativus | Cucumber |
| Cucumis | dudaim | Dudaim Melon |
| Cucumis | chate | Hairy Cucumber |
| Cucumis | hardwickii | Hill Colocynth of India |
| Cucumis | trigonis | Karit |
| Cucumis | sativus ‘Burpless Tasty Green’ | Oriental Cucumber |
| Cucumis | flexuosum | Serpent Melon |
| Cucumis | sativus var. sikkimensis | Sikkim Cucumber |
| Cucumis | sativus ‘Suyo Long’ | Suyo Long Cucumber |
| Cucumis | anguria | West Indian Gherkin |
| Cucurbita | foetidissima | Buffalo Gourd |
| Cucurbita | moschata | Butternut Squash |
| Cucurbita | ficifolia | Chilacayote |
| Cucurbita | hispida: | Chinese preserving melon |
| Cucurbita | | Gourd |
| Cucurbita | mixta | Mixta Squash |
| Cucurbita | pepo | Pumpkin |
| Cucurbita | pepo var. styriaca | Styrian Pumpkin |
| Cucurbita | pepo ‘Sweet Dumpling’ | Vegetable Gourd |
| Cucurbita | evifera | Vegetable Marrow |
| Cucurbita | anguria: | Watermelon |
| Cucurbita | citrullus: | Watermelon |
| Cucurbita | maxima | Winter Squash |
| Cuminum | | Cumin |
| Cuminum | cyminum | Cumin |
| Cunila | origanoides | Sweet Horsemint |
| Cunninghamia | lanceolata | Chinese Fir |
| Cuphea | | Cigar Flower |
| Cuphea | llavea var. miniata ‘Firefly’ | Cigar Flower |
| Cuphea | hyssopifolia | Elfin Herb |
| Cupressus | | Cypress |
| Cupressus | sempervirens | Italian Cypress |
| Cupressus | lusitanica | Mexican Cypress |
| Cupressus | macrocarpa | Monterey Cypress |
| Cupressus | glabra | Smooth Arizona Cypress |
| Cupressus | thujoides | White Cedar |
| Curanga | amara | Curanja |
| Curcuma | angustifolia | East Indian Arrowroot |
| Curcuma | leucophiza | East Indian Arrowroot |
| Curcuma | domestica | Turmeric |
| Curcuma | longa | Turmeric |
| Curcuma | zedoaria | Zedoary |
| Cuscuta | epithemum | .. (Dodder) |
| Cuscuta | hassiaca | .. (Dodder) |
| Cuscuta | trifolii | Clover Dodder |
| Cuscuta | europaea | Dodder |
| Cuscuta | epilinum | Flax Dodder |
| Cuscuta | epiphytum | Lesser Dodder |
| Cusparia | trifoliata | True Angostura |
| Cyamopsis | | Cluster Bean |
| Cyamopsis | tetragonoloba | Cluster Bean |
| Cycas | pectinata | Cycad |
| Cycas | siamensis | Cycad |
| Cycas | circinalis | Fern Palm |
| Cycas | revoluta | Sago Palm |
| Cyclamen | persicum | Cyclamen |
| Cyclamen | hederaefolium | Ivy-Leafed Cyclamen |
| Cyclanthera | pedata | Accocha |
| Cydonia | sinensis: | Chinese quince |
| Cydonia | oblonga | Quince |
| Cymbalaria | muralis | Ivy-leaved Toadflax |
| Cymbidium | | Cymbidium orchid |
| Cymbopogon | nardus | Citronella Grass |
| Cymbopogon | martine | Gingergrass |
| Cymbopogon | citratus | Lemongrass |
| Cymbopogon | flexuosus | Lemongrass |
| Cynara | cardunculus | Cardoon |
| Cynara | cardunculus: | Cardoon |
| Cynara | scolymus | Globe Artichoke |
| Cynodon | dactylon | Cocksfoot-grass |
| Cynoglossum | | Hound’s Tongue |
| Cynoglossum | officinale | Hound’s Tongue |
| Cynosurus | cristatus | Crested Dog’s Tail |
| Cyperus | esculentus | Chufa |
| Cyperus | esculentus var. sativa | Chufa |
| Cyperus | sanguinea-fuscus | Cure-pire |
| Cyperus | longus | Engish Galingale |
| Cyperus | | Galingale |
| Cyperus | bulbosus | Galingale |
| Cyperus | elegans | Galingale |
| Cyperus | odoratus | Galingale |
| Cyperus | rotundus | Galingale |
| Cyperus | scarious | Galingale |
| Cyperus | tegetum | Galingale |
| Cyperus | articulatus | Guinea Rush |
| Cyperus | hexastachys | Mootha |
| Cyperus | pertenuis | Nagar-motha |
| Cyperus | papyrus | Papyrus |
| Cyperus | corymbosus | Peri Peri |
| Cyperus | alternifolius | Umbrella Plant |
| Cyphomandra | betacea | Tree Tomato |
| Cypripedium | hirsutum: | American Valerian |
| Cypripedium | parviflorum | American Valerian |
| Cypripedium | pubescens | American Valerian |
| Cypripedium | calceolus | Lady’s Slipper Orchid |
| Cypripedium | | Lady’s Slippers |
| Cypripedium | montanum | Mountain ladyslipper |
| Cyrilla | racemiflora | Leatherwood UK |
| Cytisus | ardoinii | Broom |
| Cytisus | battandieri | Broom |
| Cytisus | laburnum | Laburnum |
| Cytisus | albus | Portuguese Broom |
| Cytisus | purpurascens | Purple Laburnum |
| Cytisus | scoparius | Scotch Broom |
| Cytisus | multiflorus | Spanish Broom |
| Cytisus | prolifer | Tree Lucerne |
| Daboecia | cantabrica | Irish Heath |
| Dactylopius | coccus | Cochineal |
| Daemomorops | micranthus | .. (Malay) |
| Daemomorops | propinguus | .. (Malay) |
| Daemomorops | draco | Dragon’s Blood |
| Daemomorops | cinnabari | Zanzibar Drop |
| Daemonorops | draco | Dragon’s blood palm |
| Dahlia | variabilis | Georgina |
| Dalea | formosa | Feather Dalea |
| Dalea | | Toronjil |
| Daphne | cneorum | Garland Flower |
| Daphne | mezereum | Mezereon |
| Daphne | gnidium | Spurge Flax |
| Daphne | laureola | Spurge Laurel |
| Daphne | | Spurge Laurels |
| Darlingtonia | californica | California Pitcher Plant |
| Dasylirion | | Bear Grass |
| Dasylirion | wheeleri | Desert Spoon |
| Datura | | Angel’s Trumpet Tree |
| Datura | suaveolens | Angel’s Trumpet Tree |
| Datura | metel | Black Datura |
| Datura | ferox | Chinese Datura |
| Datura | sanguinea | Eagle Tree |
| Datura | meteloides | Moonflower |
| Datura | metel flora pleno | Purple Angel’s Trumpet |
| Datura | tatula | Purple Stramonium |
| Datura | stramonium | Thornapple |
| Datura | inoxia | Toloache |
| Datura | arborea | Tree Datura |
| Datura | inoxia ssp.quinquecuspida | White Angel’s Trumpet |
| Datura | cloranthra | Yellow Angel’s Trumpet |
| Daucus | carota subsp. sativus | Carrot |
| Daucus | | Carrots |
| Daucus | carota | Wild Carrot |
| Davidia | involucrata | Pocket-handkerchief Tree |
| Delonix | regia | Royal Poinciana |
| Delphinium | virescens | Prairie Larkspur |
| Delphinium | staphisagria | Stavesacre |
| Dendromecon | rigidum | Californian Poppy Bush |
| Dentaria | laciniata | Pepperroot |
| Dentaria | | Toothwort |
| Dentidia | nankinensis: | Shiso |
| Desmanthus | | Bundle Flower |
| Desmanthus | illinoensis | Illinois Bundleflower |
| Desmodium | canadense | Canada Tick-trefoil |
| Desmodium | gangeticum | Salparni |
| Desmodium | incanum | Spanish Clover |
| Dianthus | x allwoodii | Allwood’s Dianthus |
| Dianthus | amurensis | Amur Pink |
| Dianthus | gratianopolitanus | Cheddar Pink |
| Dianthus | caryophyllus | Clove Pink |
| Dianthus | caryophyllus ‘Grenadin’ | Clove-pink |
| Dianthus | carthusianorum | Clusterhead Pink |
| Dianthus | plumarius | Fragrant Cottage Pink |
| Dianthus | deltoides | Maiden Pink |
| Dianthus | | Pink |
| Dianthus | superbus | Superb Pink |
| Dianthus | barbatus | Sweet William |
| Dianthus | sinensis | Velvet N Lace Dianthus |
| Diascia | barberae | Twinspur |
| Dicentra | formosa | Bleeding Heart |
| Dicentra | spectabilis | Bleeding Heart |
| Dicentra | eximia | Fringed Bleeding Heart |
| Dicentra | chrysantha | Golden Eardrops |
| Dicentra | canadensis | Turkey Corn |
| Dichelostemma | pulchellum | Blue dicks |
| Dicksonia | antarctica | Tasmanian Tree Fern |
| Dicksonia | | Tree Fern |
| Dictamnus | albus | Burning Bush |
| Dictamnus | | Dittany |
| Dictamnus | albus var. rubra | Pink Burning Bush |
| Didiscus | caeruleus | Blue Lace Flower |
| Didiscus | caeruleus ‘Heavenly Blue’ | Blue Lace-flower |
| Didiscus | | Lace Flower |
| Dieffenbachia | amoena | Dumb Cane |
| Dieffenbachia | arvida | Dumb Cane |
| Dieffenbachia | picta | Dumb Cane |
| Dieffenbachia | maculata | Dumbcane |
| Dierama | pulcherrimum | Wand Flower |
| Digitalis | obscura | Dark Foxglove |
| Digitalis | | Foxglove |
| Digitalis | nervosa | foxglove |
| Digitalis | purpurea | Foxglove |
| Digitalis | lanata | Grecian Foxglove |
| Digitalis | viridiflora | Green Foxglove |
| Digitalis | ferruginea | Rusty Foxglove |
| Digitalis | laevigata | Smooth-leaved Foxglove |
| Digitalis | parviflora | Spanish Foxglove |
| Digitalis | lutea | Straw Foxglove |
| Digitalis | x mertonensis | Strawberry Foxglove |
| Digitalis | grandiflora | Yellow Perennial Foxglove |
| Dimocarpus | litchi: | Litchi |
| Dimocarpus | longana: | Longan |
| Dimorphotheca | barberiae | African Daisy |
| Dimorphotheca | ecklonis | African Daisy |
| Dimorphotheca | aurantiaca | Star of The Veldt |
| Dion | edule | Mexican Arrowroot |
| Dioscorea | japonica | Chinese yam |
| Dioscorea | batatas | Cinnamon Yam |
| Dioscorea | villosa | Wild Yam |
| Dioscorea | | Yams |
| Diospyros | lotus | Date Plum |
| Diospyros | chinensis: | Japanese persimmon |
| Diospyros | costata: | Japanese persimmon |
| Diospyros | kaki | Japanese persimmon |
| Diospyros | roxburgii: | Japanese persimmon |
| Diospyros | schitze: | Japanese persimmon |
| Diphasiastrum | complanatum | American clubmoss |
| Dipsacus | sylvestris | Common Teazle |
| Dipsacus | laciniatus | Cutleaf Teasel |
| Dipsacus | sativus | Fuller’s Teasel |
| Dipsacus | fullonum: | Fuller’s Teazle |
| Dipsacus | pilosus | Small Teazle |
| Dipsacus | inermis | Spineless Teasel |
| Dipsacus | | Teasel |
| Dipteryx | odorata | Tonquin Bean |
| Dirca | palustris | American Mezereon |
| Disporum | hookeri | Hooker’s fairybells |
| Disporum | smithii | Smith’s fairybells |
| Dizygotheca | elegantissima | False Aralia |
| Dodecatheon | alpinum | Shooting Star |
| Dodecatheon | meadia | Shootingstar |
| Dolichos | lablab | Hyacinth Bean |
| Dolichos | biflorus | Twin Flower |
| Dorema | ammoniacum | Ammoniacum |
| Doronicum | austriacum | Austrian Leopard’s Bane |
| Doronicum | | Leopard’s Bane |
| Doronicum | caucasicum | Leopard’s Bane |
| Doronicum | plantagineum | Leopard’s Bane |
| Doronicum | cordatum | Showy Leopard’s Bane |
| Dorstenia | brasiliensis | Contrayerva |
| Dorstenia | contrayerva | Contrayerva |
| Dorstenia | drabena | Contrayerva |
| Dracaena | fragrans | Corn plant |
| Dracaena | marginata | Dragon tree |
| Dracaena | draco | Tear Dragon’s Blood |
| Dracocephalum | | Dragonhead |
| Dracocephalum | isabellae | dragonhead |
| Dracocephalum | moldavicum | Dragonhead |
| Dracocephalum | austriacum | Pontic dragonhead |
| Dracocephalum | sibiricum | Siberian Catnip |
| Dracontium | foetidum | Skunk Cabbage |
| Dracunculus | vulgaris | Arum Arrowroot |
| Drimia | ciliaris | Itch-bulb |
| Drimys | winteri | Winter’s Bark |
| Drosera | | sundew |
| Drosera | rotundifolia | Sundew |
| Dryas | octopetala | Mountain Avens |
| Dryobalanops | camphora | Borneo Camphor |
| Dryobalanops | aromatica | Borneo camphor tree |
| Dryobalanops | camphora: | Borneo camphor tree |
| Dryopteris | filix-mas | Male Fern |
| Dryopteris | spinulosa | Pricklytoothed Shield Fer |
| Duboisia | myoporoides | Corkwood Tree |
| Duboisia | hopwodii | Duboisia |
| Duchesnea | indica | False Strawberry |
| Ecballium | elaterium | Squirting Cucumber |
| Eccremocarpus | scaber | Chilean Glory Flower |
| Eccremocarpus | | Glory Flower |
| Echinacea | | Echinacea |
| Echinacea | angustifolia | Narrowleaf Coneflower |
| Echinacea | pallida | Pale Purple Coneflower |
| Echinacea | purpurea | Purple Coneflower |
| Echinacea | tennesseensis | Tennessee Coneflower |
| Echinacea | paradoxa | Yellow Coneflower |
| Echinocactus | grusonii | Barrel cactus |
| Echinocystis | lobata | Wild Balsam Apple |
| Echinops | ritro ssp. ruthenicus | Bright Blue Globe Thistle |
| Echinops | spaerocephalus | Giant Globe Thistle |
| Echinops | | Globe Thistle |
| Echinops | bannaticus | Globe Thistle |
| Echinops | ritro | Globe Thistle |
| Echinops | exaltatus | Russian Globe Thistle |
| Echites | saligna: | Star jasmine |
| Echium | wildpretii | Tower of Jewels |
| Echium | lycopsis | Viper’s Bugloss |
| Echium | vulgare | Viper’s Bugloss |
| Eclipta | alba | Eclipta |
| Edraianthus | graminifolius | Grassy Bells |
| Eisenia | bicyclis | arame |
| Elaeagnus | umbellata | Autumn Oleaster |
| Elaeagnus | angustifolia | Russian Olive |
| Eleocharis | quinqueflora | Chocolate-headed Clubrush |
| Elettaria | cardamomum var. major | Ceylon Wild Cardamoms |
| Elettaria | cardamomum | True Cardamom |
| Eleusine | coracana | Dragon’s Claw Millet |
| Eleutherococcus | senticosus | Siberian Ginseng |
| Elsholtzia | ciliata | Elsholtzia |
| Elsholtzia | stauntonii | Mint-balm |
| Elymus | canadensis | Canada Wild Rye |
| Elymus | repens | Couch-grass |
| Embelia | basaal | .. (India) |
| Embelia | ribes | Embelia |
| Embelia | robusta | Embelia |
| Embothrium | coccineum | Chilean Fire Bush |
| Embryopteris | kaki: | Japanese persimmon |
| Empetrum | nigrum | Crowberry |
| Encelia | farinosa | brittlebush |
| Encephalartos | altensteinii | Bread tree cycad |
| Encephalartos | barteri | Ghost Palm |
| Endymion | non-scripta | Bluebell |
| Endymion | hispanicus | Spanish Bluebell |
| Enteromorpha | intestinalis | Enteromorpha |
| Eopepon | aurantiacus: | Chinese cucumber |
| Eopepon | vitifolius: | Chinese cucumber |
| Ephedra | nevadensis | Ephedra |
| Ephedra | vulgaris | Ephedra |
| Ephedra | sinica | Ma Huang |
| Ephedra | viridis | Mormon Tea |
| Epigaea | repens | Trailing Arbutus |
| Epilobium | angustifolium | Fireweed |
| Epilobium | hirsutum | Great Hairy Willow-herb |
| Epilobium | parviflorum | Willow Herb |
| Equisetum | fluviatile | great horsetail |
| Equisetum | maximum: | great horsetail |
| Equisetum | arvense | Horsetail |
| Equisetum | hyemale | scouring rush |
| Equisetum | sylvaticum | Wood Horsetail |
| Erechtites | hieracifolia | Fireweed |
| Eremurus | | Desert Candle |
| Eremurus | bungei | Foxtail Lily |
| Eremurus | robustus | Foxtail Lily |
| Eremurus | stenophyllus | Foxtail Lily |
| Erica | vagans | Cornish Heath |
| Erica | tetralix | Cross-leafed Heath |
| Erica | umbellata | Heath |
| Erica | x darleyensis | Heath |
| Erica | lusitanica | Portuguese Heath |
| Erica | cinerea | Scotch Heath |
| Erica | australis | Spanish Heath |
| Erica | arborea | Tree Heath |
| Erica | x veitchii | Tree Heath |
| Erica | carnea | Winter Heath |
| Erigeron | | Fleabane |
| Erigeron | acre | Fleabane |
| Erigeron | aureus | Fleabane |
| Erigeron | mucronatus | Fleabane |
| Erigeron | speciosus var. grandiflorus | Oregon Fleabane |
| Erinacea | pungens | Hedgehog Broom |
| Erinus | alpinus | Alpine Balsam |
| Eriobotrya | japonica | Loquat |
| Eriodictyon | californicum | Yerba Santa |
| Eriodictyon | glutinosum | Yerba Santa |
| Eriogonum | | Buckwheat Bush |
| Eriogonum | deflexum | Skeleton Weed |
| Eriogonum | umbellatum | Sulphur Flower |
| Eriophorum | angustifolium | Cotton Grass |
| Eritrichium | nanum | The King of The Alps |
| Eruca | sativa | Rocket Sallad |
| Eruca | marina | Sea Rocket |
| Ervum | lens | Lentil |
| Eryngium | aquaticum | Button Snake-root |
| Eryngium | foetidum | False Coriander |
| Eryngium | campestre | Field Eryngo |
| Eryngium | yuccifolium | Rattlesnake Master |
| Eryngium | alpinum | Sea Holly |
| Eryngium | giganteum | Sea Holly |
| Eryngium | maritimum | Sea Holly |
| Eryngium | tripartitum | Sea Holly |
| Eryngium | variifolium | Sea Holly |
| Eryngium | planum | Seaholly |
| Erysimum | orientale | Hare’s Ear Treacle Mustar |
| Erysimum | Allionii -hybr. | Siberian Wallflower |
| Erysimum | cheiranthoides | Treacle Hedge Mustard |
| Erythraea | latifolia | Broad-leaved Centaury |
| Erythraea | acaulis | Centaury |
| Erythraea | chilensis | Chilian Centaury |
| Erythraea | pulchella | Dwarf Centaury |
| Erythraea | littoralis | Dwarf Tufted Centaury |
| Erythrina | vespertilio | Bat-wing Coral Tree |
| Erythrina | crista-gallii | Cockspur Coral Tree |
| Erythrina | | Coral Tree |
| Erythrina | corallodendrum | Coral Tree |
| Erythrina | indica | Indian Coral Tree |
| Erythrina | lysistemon | South Africa Coral Tree |
| Erythrina | americana | Tzompantle |
| Erythrolena | conspicua | Scarlet Thistle |
| Erythronium | americanum | Adder’s Tongue |
| Erythronium | tuolumnense | Adder’s Tongue |
| Erythronium | montanum | Avalanche lily |
| Erythronium | dens-canis | Dog-tooth Violet |
| Erythronium | revolutum | Pink fawn lily |
| Erythronium | oregonum | White fawn lily |
| Erythronium | grandiflorum | Yellow glacier lily |
| Erythrophloeum | guineense | Sassy Bark |
| Erythroxylum | coca | Bolivian Coca |
| Eschscholzia | | California Poppy |
| Eschscholzia | californica | California Poppy |
| Eschscholzia | caespitosa | Yellow California Poppy |
| Eucalyptus | gunnii | Apple Eucalyptus |
| Eucalyptus | niphophila | Australian Snow Gum |
| Eucalyptus | megacornuta | Big-horned Gum |
| Eucalyptus | kruseana | Book-leaf |
| Eucalyptus | citriodora | Citron-scented Gum |
| Eucalyptus | macrocarpa | Coolgardie Rose |
| Eucalyptus | | Eucalyptus |
| Eucalyptus | forrestiana | Fuschia Malle |
| Eucalyptus | pauciflora | Ghost Gum |
| Eucalyptus | smithii | Gully Ash |
| Eucalyptus | gunnii var. rubida | Gum Tree |
| Eucalyptus | macrorrhyncha | Gum Tree |
| Eucalyptus | mannifera | Gum Tree |
| Eucalyptus | nostrata | Gum Tree |
| Eucalyptus | odorata | Gum Tree |
| Eucalyptus | perriniana | Gum Tree |
| Eucalyptus | resinifera | Gum Tree |
| Eucalyptus | simmondsii | Gum Tree |
| Eucalyptus | caesia | Gungurru |
| Eucalyptus | cloeziana | Gympie Messmate |
| Eucalyptus | melliodora | Honey Eucalyptus |
| Eucalyptus | staigeriana | Lemon-scented Iron Bark |
| Eucalyptus | bakeri | Malee Box |
| Eucalyptus | viminalis | Manna Gum |
| Eucalyptus | pulverulenta | Money Tree |
| Eucalyptus | mac-arthurii | Paddy River Box |
| Eucalyptus | nicholii | Peppermint Eucalyptus |
| Eucalyptus | radiata | Peppermint Eucalyptus |
| Eucalyptus | dives | Peppermint Gum |
| Eucalyptus | piperita | Peppermint Stringybark |
| Eucalyptus | polyanthemos | Red Box |
| Eucalyptus | erythronema | Red Flowered Mallee |
| Eucalyptus | sideroxylon | Red Ironbark |
| Eucalyptus | camaldulensis | River Red Gum |
| Eucalyptus | ficifolia | Scarlet Flowered Gum |
| Eucalyptus | saligna | Sidney Blue Gum |
| Eucalyptus | cinerea | Silver Dollar Eucalyptus |
| Eucalyptus | cinerea ‘Pendula’ | Silver Dollar Eucalyptus |
| Eucalyptus | polybractea | Silver Malee Scrub |
| Eucalyptus | globulus | Tasmanian Blue Gum |
| Eucalyptus | coccifera | Tasmanian Snow Gum |
| Eucalyptus | leucoxylon | White Ironbark |
| Eucalyptus | pulchella | White Peppermint Eucalypt |
| Eucharidium | breweri ‘Pink Ribbons’ | Fairy Fans |
| Eucharis | grandiflora | Amazon Lily |
| Euchema | spinolum | Macassar Agar-Agar |
| Eugenia | cheken | Cheken |
| Eugenia | caryophyllata | Clove tree |
| Eugenia | jambolana | Jambul |
| Eugenia | malaccensis | Malay Apple |
| Eugenia | jambos | Rose Apple |
| Euonymus | cornutus | Horned spindleberry |
| Euonymus | atropurpureus | Spindle Tree |
| Euonymus | europaeus | Spindle Tree |
| Euonymus | latifolius | Spindle Tree |
| Euonymus | sachalinensis | Spindle Tree |
| Euonymus | yedoensis | Spindle Tree |
| Euonymus | kiautschovicus | Spreading Euonymus |
| Euonymus | occidentalis | Western wahoo |
| Euonymus | alatus | Winged Spindle Tree |
| Euonymus | subtriflorus: | Winged spindle-tree |
| Euonymus | thunbergianus: | Winged spindle-tree |
| Euonymus | fortunei | Wintercreeper Euonymus |
| Eupatorium | nervosum | Bitter Bush |
| Eupatorium | villosum | Bitter-Bush |
| Eupatorium | perfoliatum | Boneset |
| Eupatorium | cannabinum | Common Hemp Agrimony |
| Eupatorium | glutinosum | False Matico |
| Eupatorium | purpureum | Gravelroot |
| Eupatorium | ayapana | Joe Pye Weed |
| Eupatorium | collinum | Joe Pye Weed |
| Eupatorium | foeniculum | Joe Pye Weed |
| Eupatorium | hyssopifolium | Joe Pye Weed |
| Eupatorium | leucolepsis | Joe Pye Weed |
| Eupatorium | officinalis | Joe Pye Weed |
| Eupatorium | rotundifolium | Joe Pye Weed |
| Eupatorium | urticaefolium | Joe Pye Weed |
| Eupatorium | aromaticum | Mata |
| Eupatorium | incarnatum | Mata |
| Eupatorium | | Purple Boneset |
| Eupatorium | rebaudiana | Sweet Herb |
| Eupatorium | ageratoides | White Snake-root |
| Eupatorium | teucrifolium | Wild Horehound |
| Euphorbia | palustris | Bog Spurge |
| Euphorbia | lactea | Candelabra cactus |
| Euphorbia | cerifera | Candelilla Wax |
| Euphorbia | lathyrus | Caper Spurge |
| Euphorbia | epithymoides | Cushion Spurge |
| Euphorbia | wulfenii | Dalmatian Spurge |
| Euphorbia | characias | Large Mediterr Spurge |
| Euphorbia | esula | Leafy Spurge |
| Euphorbia | marginata | Mountain Snow |
| Euphorbia | resinifera | Officinal Spurge |
| Euphorbia | pilulifera | Pill-bearing Spurge |
| Euphorbia | pulcherrima | Poinsettia |
| Euphorbia | fulgens | Scarlet Plume |
| Euphorbia | maculata | Spotted Spurge |
| Euphorbia | aleppica | Spurge |
| Euphorbia | amydaloides | Spurge |
| Euphorbia | antiguorum | Spurge |
| Euphorbia | apois | Spurge |
| Euphorbia | balsamifera | Spurge |
| Euphorbia | buxifolia | Spurge |
| Euphorbia | canariensis | Spurge |
| Euphorbia | canescens | Spurge |
| Euphorbia | cotinifolia | Spurge |
| Euphorbia | cremocarpus | Spurge |
| Euphorbia | cyparissias | Spurge |
| Euphorbia | dendroides | Spurge |
| Euphorbia | drummondii | Spurge |
| Euphorbia | gerardiane | Spurge |
| Euphorbia | griffithii | Spurge |
| Euphorbia | heterodoxa | Spurge |
| Euphorbia | hiberna | Spurge |
| Euphorbia | hirta | Spurge |
| Euphorbia | humistrata | Spurge |
| Euphorbia | hypericifolia | Spurge |
| Euphorbia | iata | Spurge |
| Euphorbia | laurifolia | Spurge |
| Euphorbia | ligularia | Spurge |
| Euphorbia | linearis | Spurge |
| Euphorbia | mauritanica | Spurge |
| Euphorbia | myrsinites | Spurge |
| Euphorbia | papillosa | Spurge |
| Euphorbia | parviflora | Spurge |
| Euphorbia | peplis | Spurge |
| Euphorbia | peploides | Spurge |
| Euphorbia | peplus | Spurge |
| Euphorbia | pilosa | Spurge |
| Euphorbia | platyphylla | Spurge |
| Euphorbia | portulacoides | Spurge |
| Euphorbia | prostata | Spurge |
| Euphorbia | robbiae | Spurge |
| Euphorbia | spinosa | Spurge |
| Euphorbia | tetragona | Spurge |
| Euphorbia | thymifolia | Spurge |
| Euphorbia | tirucalli | Spurge |
| Euphorbia | tribuloides | Spurge |
| Euphorbia | | Spurges |
| Euphorbia | helioscopia | Sun Spurge |
| Euphorbia | ipecacuanha | White Ipecacuanha |
| Euphorbia | corollata | White Purslane |
| Euphoria | longana: | Longan |
| Euphrasia | rostkoviana | Eyebright |
| Eustrephus | | Australian Climbing Lily |
| Eustrephus | latifolius | Wombat Berry |
| Eutrema | japonica | Wasabi |
| Evernia | | Oakmoss |
| Evernia | prunastri | Oakmoss |
| Evernia | purpuracea | Oakmoss |
