Cyathea (tree fern) Cyathodes Cybistax Cycas (cycad, sago palm) Cyclamen Cycnoches an orchid genus Cydista, synonym of Bignonia Cydonia (quince) Cylindropuntia Cymbalaria (ivy-leaved toadflax) Cymbidium (an orchid genus) Cymbopogon Cynara Cynodon Cynoglossum (hound's tongue) Cypella Cyperus Cyphomandra (tree tomato) Cyphostemma Cypripedium (lady's slipper; an orchid genus) Cyrilla Cyrtanthus (fire lily) Cyrtomium Cyrtostachys Cystopteris (bladder fern) Cytisus (broom) D Daboecia Dacrydium Dactylis Dactylorhiza (marsh orchid) Dahlia Dalea (indigo bush) Dalechampia Damasonium Dampiera Danae Daphne Daphniphyllum Darlingia Darmera syn. Peltiphyllum Darwinia (lemon scented myrtle) Dasylirion Datura Davallia (hare's foot fern) Davidia Daviesia Decaisnea × Degarmoara (a hybrid orchid genus) Decarya Decumaria Deinanthe Delairea Delonix Delosperma Delphinium Dendranthema Dendrobium (an orchid genus) Dendrocalamus Dendrochilum (an orchid genus) Dendromecon (tree poppy) Denmoza Dennstaedtia (Hayscented fern or Cup fern) Deppea Derris Derwentia Deschampsia (hair grass) Desfontainia Desmodium Deuterocohnia syn. Abromeitiella Deutzia Dianella (flax lily) Dianthus (carnation, pink) Diascia (twinspur) Dicentra (bleeding heart) Dichelostemma Dichondra Dichorisandra Dichroa Dicksonia Dicliptera Dictamnus (burning bush, dittany) Dictyosperma (princess palm) Didymochlaena Dieffenbachia (dumb cane, mother-in-law's tongue, tuftroot) Dierama (African harebell, angel's fishing rod, wand flower) Diervilla (bush honeysuckle) Dietes Digitalis (foxglove) Dillenia Dillwynia Dimorphotheca (African daisy) Dionaea (Venus flytrap) Dionysia Dioon Dioscorea syns. Rajania, Tamus, Testudinaria(yam) Diospyros (ebony, persimmon) Dipcadi Dipelta Diphylleia Diplarrhena (butterfly flag) Diplazium Diplocyclos Diploglottis Diplolaena Dipsacus (teasel) Dipteris Dipteronia Dipteryx Dirca (leatherwood) Disa (an orchid genus) Disanthus Discaria Dischidia Discocactus Disocactus Disporopsis Disporum (fairy-bells) Dissotis Distictis Distylium Dizygotheca Docynia Dodecatheon (shooting stars, American cowslip), now Primula sect. Dodecatheon Dodonaea (hop bush) Dolichandrone Dombeya Doodia (hacksaw fern, rasp fern) Doronicum (leopard's bane) Dorotheanthus (ice plant, Livingstone daisy) Dorstenia Doryanthes (spear lily) Doryopteris Dovyalis Draba (whitlow grass) Dracaena Dracocephalum Dracophyllum Dracula (an orchid genus) Dracunculus Dregea Drimys Drosanthemum Drosera (sundew) Dryandra Dryas (mountain avens) Drynaria Dryopteris (buckler fern, shield fern, wood fern) Duboisia Duchesnea (Indian strawberry, mock strawberry) Dudleya Duranta Duvalia Dyckia Dymondia Dypsis syn. Chrysalidocarpus, Neodypsis E Ebracteola Ecballium Eccremocarpus Echeveria Echidnopsis Echinacea (coneflower) Echinocactus Echinocereus Echinops (globe thistle) Echinopsis Echium Edgeworthia Edithcolea Edraianthus Egeria Ehretia Eichhornia (water hyacinth) Elaeagnus Elaeis (oil palm) Elaeocarpus Elatostema Eleocharis (spike rush) Elettaria Eleutherococcus Elodea (pondweed) Elsholtzia Elymus (wild rye) Embothrium Emilia (tasselflower) Emmenopterys Encelia Encephalartos (Kaffir bread) Encyclia (an orchid genus) Enkianthus Ensete Eomecon (snow poppy) Epacris Ephedra (ephedra) Epidendrum (an orchid genus) Epigaea Epilobium Epimedium (barrenwort) Epipactis (helleborine, an orchid genus) Epiphyllum (orchid cactus) Episcia (flame violet) Epithelantha Equisetum (horsetail) Eragrostis (love grass) Eranthemum Eranthis (winter aconite) Ercilla Eremophila