- damson
- daphne
- darnel
- date
- date-palm
- datura
- dead-nettle
- deadly nightshade
- dealt
- dandelion
- day-lily
- deal
- defoliation
- delphinium
- deciduous
- decaphyllous
- decumbent
- deflorate
- defoliate
- dentate
- derris
- diatom
- dichgamy
- diclinous
- dicotyledon
- devil-wood
- dewberry
- dextrorse
- diadelphous
- dianadrous
- dianthus
- dichgamous
- dicotyledonous
- dill
- dimerous
- dioecious
- dipetalous
- dicratic
- digitalis
- distal
- distichous
- dittany
- dodder
- dog-grass
- dog-tail
- dogwood
- dormant
- dock
- dog-fennel
- doum
- dracaena
- drupelet
- dotty
- double
- dragon-tree
- drupe
- duckweed
- duramen
- durmast
- durra
- dust
- dust-brand
- dwale
- ebony-tree
- edelweiss
- effuse
- elder
- elecampane
- egg-plant
- eglantine
- egret
- eel-grass
- eleutheropetalous
- eleutherophylous
- elm
- elongate
- endocarp
- endive
- enneagynous
- entomophilous
- endosperm
- endospore
- engraft
- enneandrous
- ensiform-leaved
- epicarp
- epidendrum
- epiphyllous
- epiphyllum
- equisetum
- equitant
- enneapetalous
- ergotism
- ericaceous
- eryngium
- eschalot
- eucharis
- euphorbiaceous
- erigeron
- eschscholtzia