| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| DISM4 | Digitaria smutsii Stent | Digitaria eriantha ssp. eriantha | Poaceae
|
| DISU | Digitaria subcalva A.S. Hitchc. | Digitaria texana | Poaceae
|
| DITE | Digitaria texana A.S. Hitchc. | Texas crabgrass | Poaceae
|
| DIUM2 | Digitaria �umfolozi D.W. Hall in Turrialba | crabgrass | Poaceae
|
| DIVA5 | Digitaria valida Stent | Digitaria eriantha ssp. pentzii | Poaceae
|
| DIVE2 | Digitaria velutina (Forsk.) Beauv. | velvet crabgrass | Poaceae
|
| DIVI | Digitaria villosa (Walt.) Pers. | shaggy crabgrass | Poaceae
|
| DIVI2 | Digitaria violascens Link | violet crabgrass | Poaceae
|
| DIGIT2 | Digitaria Haller | crabgrass | Poaceae
|
| DIBI3 | Diholcos bisulcatus (Hook.) Rydb. | Astragalus bisulcatus var. bisulcatus | Fabaceae
|
| DIIN6 | Dillenia indica L. | chulta | Dilleniaceae
|
| DIOV3 | Dillenia ovata Wallich ex Hook. f. & Thomson | ovate dillenia | Dilleniaceae
|
| DIPH3 | Dillenia philippinensis Rolfe | Philippine dillenia | Dilleniaceae
|
| DISU11 | Dillenia suffruticosa (Griffith) Martelli | shrubby dillenia | Dilleniaceae
|
| DILLE2 | Dillenia L. | dillenia | Dilleniaceae
|
| DIMO5 | Dilomilis montana (Sw.) Summerhayes | parrotbeak orchid | Orchidaceae
|
| DILOM | Dilomilis Raf. | dilomilis | Orchidaceae
|
| DIAN5 | Dimelaena angelica (Stizenb.) Hale & Culb. | Mobergia angelica | Physciaceae
|
| DICA20 | Dimelaena californica (H. Magn.) Sheard | California mountain lichen | Physciaceae
|
| DICH10 | Dimelaena chrysomelaena (de Lesd.) Hale & Culb. | Rinodina chrysomelaena | Physciaceae
|
| DINO2 | Dimelaena novomexicana (de Lesd.) Hale & Culb. | Dimelaena oreina | Physciaceae
|
| DIOR4 | Dimelaena oreina (Ach.) Norman | mountain lichen | Physciaceae
|
| DIRA4 | Dimelaena radiata (Tuck.) Mull. Arg. | mountain lichen | Physciaceae
|
| DISU2 | Dimelaena suboreina (de Lesd.) Hale & Culb. | Dimelaena oreina | Physciaceae
|
| DITH2 | Dimelaena thysanota (Tuck.) Hale & Culb. | mountain lichen | Physciaceae
|
| DIWE2 | Dimelaena weberi Sheard | Weber's mountain lichen | Physciaceae
|
| DIMEL | Dimelaena Norman | mountain lichen | Physciaceae
|
| DIDI14 | Dimerella diluta (Pers.) Trevisan | Dimerella pineti | Gyalectaceae
|
| DILU3 | Dimerella lutea (Dickson) Trevisan | dimerella lichen | Gyalectaceae
|
| DIPI5 | Dimerella pineti (Schrader ex Ach.) Vezda | dimerella lichen | Gyalectaceae
|
| DIMER2 | Dimerella Trevisan | dimerella | Gyalectaceae
|
| DIHO2 | Dimeresia howellii Gray | doublet | Asteraceae
|
| DIMER | Dimeresia Gray | dimeresia | Asteraceae
|
| DICI6 | Dimeria ciliata Merrill | | Poaceae
|
| DIOR5 | Dimeria ornithopoda Trin. | | Poaceae
|
| DIMER3 | Dimeria R. Br. | | Poaceae
|
| DILO7 | Dimocarpus longan Lour. | longan | Sapindaceae
|
| DIMOC | Dimocarpus Lour. | dimocarpus | Sapindaceae
|
| DIEL | Dimorphanthus elatus Miq. | Aralia elata | Araliaceae
|
| DICA31 | Dimorphocarpa candicans (Raf.) Rollins | Palmer's spectaclepod | Brassicaceae
|
| DIPA8 | Dimorphocarpa palmeri (Payson) Rollins | Dimorphocarpa candicans | Brassicaceae
|
| DIPI2 | Dimorphocarpa pinnatifida Rollins | tansy spectaclepod | Brassicaceae
|
| DIWI2 | Dimorphocarpa wislizeni (Engelm.) Rollins | touristplant | Brassicaceae
|
| DIMOR | Dimorphocarpa Rollins | spectaclepod | Brassicaceae
|
| DIAN9 | Dimorphotheca annua Less. | Dimorphotheca pluvialis | Asteraceae
|
| DIAU3 | Dimorphotheca aurantiaca DC., non Horton | Castalis tragus | Asteraceae
|
| DIEC2 | Dimorphotheca ecklonis DC. | Osteospermum ecklonis | Asteraceae
|
| DIPL4 | Dimorphotheca pluvialis (L.) Moench | weather prophet | Asteraceae
|
| DISI4 | Dimorphotheca sinuata DC. | glandular cape marigold | Asteraceae
|
| DIMOR3 | Dimorphotheca Moench | cape marigold | Asteraceae
|
| DILA12 | Dimorpostachys langei Fourn. | Paspalum langei | Poaceae
|
| DICH7 | Dinebra chloridea J. Presl | Enteropogon chlorideus | Poaceae
|
| DICH6 | Dinebra chondrosioides Kunth | Bouteloua chondrosioides | Poaceae
|
| DIRE9 | Dinebra repens Kunth | Bouteloua repens | Poaceae
|
| DIRE7 | Dinebra retroflexa (Vahl) Panzer | viper grass | Poaceae
|
| DINEB | Dinebra Jacq. | viper grass | Poaceae
|
| DIHE2 | Dioclea hexandra (Ralph) Mabberley | bejuco de mato | Fabaceae
|
| DIMU | Dioclea multiflora (Torr. & Gray) C. Mohr | Boykin's clusterpea | Fabaceae
|
| DIRE5 | Dioclea reflexa Hook. f. | Dioclea hexandra | Fabaceae
|
| DIWI4 | Dioclea wilsonii Standl. | Wilson's clusterpea | Fabaceae
|
| DIOCL | Dioclea Kunth | dioclea | Fabaceae
|
| DIRI3 | Diodella rigida (Willd. ex Roemer & J.A. Schultes) Small | Diodia apiculata | Rubiaceae
|
| DITE6 | Diodella teres (Walt.) Small | Diodia teres var. teres | Rubiaceae
|
| DIAP | Diodia apiculata (Willd. ex Roemer & J.A. Schultes) K. Schum. | stiff buttonweed | Rubiaceae
|
| DIDA | Diodia dasycephala Cham. & Schlecht. | carretilla | Rubiaceae
|
| DIHA | Diodia harperi Small | Diodia virginiana var. virginiana | Rubiaceae
|
| DIHI6 | Diodia hirsuta Pursh | Diodia virginiana var. virginiana | Rubiaceae
|
| DIMA7 | Diodia maritima Thonn. | Diodia serrulata | Rubiaceae
|
| DIOC4 | Diodia ocymifolia (Willd. ex Roemer & J.A. Schultes) Bremek. | slender buttonweed | Rubiaceae
|
| DIRA6 | Diodia radula Cham. & Schlect. | | Rubiaceae
|
| DIRI4 | Diodia rigida (Willd. ex Roemer & J.A. Schultes) Cham. & Schlecht. | Diodia apiculata | Rubiaceae
|
| DISA8 | Diodia sarmentosa Sw. | tropical buttonweed | Rubiaceae
|
| DISE10 | Diodia serrulata (Beauv.) G. Taylor | seaside buttonweed | Rubiaceae
|
| DITEA | Diodia teres Walt. var. angustata Gray | poorjoe | Rubiaceae
|
| DITEH2 | Diodia teres Walt. var. hirsutior Fern. & Grisc. | poorjoe | Rubiaceae
|
| DITEH | Diodia teres Walt. var. hystricina Fern. & Grisc. | poorjoe | Rubiaceae
|
| DITEO | Diodia teres Walt. var. oblongifolia Fern. | poorjoe | Rubiaceae
|
| DITES | Diodia teres Walt. var. setifera Fern. & Grisc. | Diodia teres var. teres | Rubiaceae
|
| DITET | Diodia teres Walt. var. teres | poorjoe | Rubiaceae
|
| DITE2 | Diodia teres Walt. | poorjoe | Rubiaceae
|
| DITE7 | Diodia tetragona Walt. | Diodia virginiana var. virginiana | Rubiaceae
|
| DITR7 | Diodia tricocca Torr. & Gray | Richardia tricocca | Rubiaceae
|
| DIVIA | Diodia virginiana L. var. attenuata Fern. | Virginia buttonweed | Rubiaceae
|
| DIVIL | Diodia virginiana L. var. latifolia Torr. & Gray | Virginia buttonweed | Rubiaceae
|
| DIVIV2 | Diodia virginiana L. var. virginiana | Virginia buttonweed | Rubiaceae
|
| DIVI3 | Diodia virginiana L. | Virginia buttonweed | Rubiaceae
|
| DIODI | Diodia L. | buttonweed | Rubiaceae
|
| DIMU4 | Dionaea muscipula Ellis | Venus flytrap | Droseraceae
|
| DIONA | Dionaea Ellis | Venus flytrap | Droseraceae
|
| DIAL2 | Dioscorea alata L. | water yam | Dioscoreaceae
|
| DIAL3 | Dioscorea altissima Lam. | dunguey | Dioscoreaceae
|
| DIBA2 | Dioscorea batatas Dcne. | Dioscorea oppositifolia | Dioscoreaceae
|
| DIBU | Dioscorea bulbifera L. | air yam | Dioscoreaceae
|
| DICA25 | Dioscorea cayenensis Lam. | yellow guinea yam | Dioscoreaceae
|
| DICA10 | Dioscorea cayennensis Lam. | yellow yam | Dioscoreaceae
|
| DICO15 | Dioscorea composita Hemsley | yam | Dioscoreaceae
|
| DICO16 | Dioscorea convolvulacea Cham. & Schldl. | yam | Dioscoreaceae
|
| DIDU2 | Dioscorea dumetorum (Kunth) Pax | bitter yam | Dioscoreaceae
|
| DIEL2 | Dioscorea elephantipes (L'Her.) Engl. | hottentot-bread | Dioscoreaceae
|
| DIES2 | Dioscorea esculenta (Lour.) Burkill | lesser yam | Dioscoreaceae
|
| DIFL5 | Dioscorea floribunda C. Martius & Galeotti | yam | Dioscoreaceae
|