Common names: D
- daffodil
- dahlia
- daisy
- Dalmatian bellflower
- Dalmatian cranesbill
- Dalmatian laburnum
- Dalmatian toadflax
- damask rose
- dame's rocket
- dame's violet
- dandelion
- daphne
- daphne lilac
- dappled willow
- dark mullein
- Darwin tulip
- date palm
- David viburnum
- David's lily
- dawn redwood
- day lily
- dayflower
- dead nettle
- deadly nightshade
- deadnettle
- death camas
- deathcamas
- deciduous azalea
- decorative dahlia
- decorative pepper
- decorative squash
- decorative tobacco
- deer fern
- Delavay's privet
- Delavay's tree peony
- dense blazing star
- dense yew
- dense-flowered loosestrife
- dense-flowered mullein
- Deodar cedar
- desert beard tongue
- desert candle
- desert delphinium
- desert false indigo
- desert marigold
- desert prickly pear
- desert prince's plume
- desert rose
- devil maple
- devil's claw
- devil's trumpet
- Diels cotoneaster
- digger's speedwell
- dill
- dingle dangle tree
- dissected dahlia
- distaff thistle
- dittany
- dock
- dog poison
- dog rose
- dog's mercury
- dog's tooth violet
- dogbane
- dogtooth violet
- dogwood
- donkey tail
- dotted ball flower
- dotted hawthorn
- dotted loosestrife
- double daffodil
- double early tulip
- double late tulip
- Douglas aster
- Douglas fir
- dove tree
- downy birch
- downy burdock
- downy cherry
- downy clematis
- downy mildew
- downy service berry
- downy thorn apple
- dragon arum
- dragon tree
- drumstick primrose
- Duby's violet
- duckweed
- dune pansy
- dune poison bush
- durmast oak
- dusky coral pea
- dusky cranesbill
- dusty miller
- Dutch clover
- Dutch crocus
- Dutch eggplant
- Dutch elm
- Dutch myrtle
- dutchman's breeches
- dutchman's pipe
- dwarf Alberta spruce
- dwarf bamboo
- dwarf bearded iris
- dwarf brodiaea
- dwarf buckeye
- dwarf bulrush
- dwarf catmint
- dwarf cattail
- dwarf cedar
- dwarf Chinese astilbe
- dwarf comfrey
- dwarf common spruce
- dwarf cypress
- dwarf daffodil
- dwarf elder
- dwarf everlasting
- dwarf false indigo
- dwarf fothergilla
- dwarf fountain grass
- dwarf horehound
- dwarf iris
- dwarf jade plant
- dwarf juniper
- dwarf kurrajong
- dwarf marigold
- dwarf morning glory
- dwarf mountain pine
- dwarf Norway spruce
- dwarf papyrus
- dwarf pine
- dwarf purple rhododendron
- dwarf rhododendron
- dwarf rose
- dwarf Russian almond
- dwarf tree fern
- dwarf willow
- dyer's broom
- dyer's bugloss
- dyer's chamomile
- dyer's greenweed
- dyer's saffron
- dyer's weed
- dyer's woodruff