| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| DIER3 | Diellia erecta Brack. | erect island spleenwort | Aspleniaceae
|
| DIFA | Diellia falcata Brack. | sickle island spleenwort | Aspleniaceae
|
| DILA7 | Diellia laciniata (Hbd.) Diels | cutleaf island spleenwort | Aspleniaceae
|
| DILE9 | Diellia leucostegioides (Baker) W.H. Wagner | necklace island spleenwort | Aspleniaceae
|
| DIMA3 | Diellia mannii (D.C. Eat.) Robins. | Mann's island spleenwort | Aspleniaceae
|
| DIPA25 | Diellia pallida W.H. Wagner | pale island spleenwort | Aspleniaceae
|
| DIUN3 | Diellia unisora W.H. Wagner | singlesorus island spleenwort | Aspleniaceae
|
| DIELL | Diellia Brack. | island spleenwort | Aspleniaceae
|
| DIDI12 | Diervilla diervilla (L.) MacM. | Diervilla lonicera | Caprifoliaceae
|
| DIFL7 | Diervilla florida (Bunge) Sieb. & Zucc. | Weigela florida | Caprifoliaceae
|
| DILOH | Diervilla lonicera P. Mill. var. hypomalaca Fern. | Diervilla lonicera | Caprifoliaceae
|
| DILO | Diervilla lonicera P. Mill. | northern bush honeysuckle | Caprifoliaceae
|
| DIRI | Diervilla rivularis Gattinger | mountain bush honeysuckle | Caprifoliaceae
|
| DISER | Diervilla sessilifolia Buckl. var. rivularis (Gattinger) Ahles | Diervilla rivularis | Caprifoliaceae
|
| DISE | Diervilla sessilifolia Buckl. | southern bush honeysuckle | Caprifoliaceae
|
| DIERV | Diervilla P. Mill. | bush honeysuckle | Caprifoliaceae
|
| DIAS | Dieteria asteroides Torr. | Psilactis asteroides | Asteraceae
|
| DICA18 | Dieteria canescens Nutt. | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| DIDI11 | Dieteria divaricata Nutt. | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| DIGR8 | Dieteria gracilis Nutt., non Aster gracilis Nutt. | Machaeranthera gracilis | Asteraceae
|
| DIIN3 | Dieteria incana (Lindl.) Torr. & Gray | Machaeranthera canescens ssp. canescens var. incana | Asteraceae
|
| DIPU5 | Dieteria pulverulenta Nutt. | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| DISE13 | Dieteria sessiliflora (Nutt.) Greene | Machaeranthera canescens ssp. canescens var. sessiliflora | Asteraceae
|
| DISP5 | Dieteria spinulosa (Pursh) Nutt. | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Asteraceae
|
| DIVI10 | Dieteria viscosa Nutt. | Machaeranthera canescens ssp. canescens var. canescens | Asteraceae
|
| DIGR13 | Dietes grandiflora N.E. Br. | wild iris | Iridaceae
|
| DIIR | Dietes irioides (L.) Sweet ex Klatt | | Iridaceae
|
| DIETE | Dietes Salisb. ex Klatt | dietes | Iridaceae
|
| DIAM3 | Digitalis ambigua Murr. | Digitalis grandiflora | Scrophulariaceae
|
| DIFE3 | Digitalis ferruginea L. | rusty foxglove | Scrophulariaceae
|
| DIGR4 | Digitalis grandiflora P. Mill. | yellow foxglove | Scrophulariaceae
|
| DILA3 | Digitalis lanata Ehrh. | Grecian foxglove | Scrophulariaceae
|
| DILU | Digitalis lutea L. | straw foxglove | Scrophulariaceae
|
| DIOR3 | Digitalis orientalis P. Mill. | Digitalis grandiflora | Scrophulariaceae
|
| DIPUA | Digitalis purpurea L. var. alba hort. | purple foxglove | Scrophulariaceae
|
| DIPUP2 | Digitalis purpurea L. var. purpurea | purple foxglove | Scrophulariaceae
|
| DIPU | Digitalis purpurea L. | purple foxglove | Scrophulariaceae
|
| DIGIT | Digitalis L. | foxglove | Scrophulariaceae
|
| DIAB | Digitaria abyssinica (A. Rich.) Stapf | African couchgrass | Poaceae
|
| DIAD3 | Digitaria adscendens (Kunth) Henr. | Digitaria ciliaris | Poaceae
|
| DIAL | Digitaria albicoma Swallen | Digitaria texana | Poaceae
|
| DIAR7 | Digitaria arenicola (Swallen) Beetle | sand crabgrass | Poaceae
|
| DIAR3 | Digitaria argillacea (A.S. Hitchc. & Chase) Fern. | tropical crabgrass | Poaceae
|
| DIBI | Digitaria bicornis (Lam.) Roemer & J.A. Schultes ex Loud. | Asian crabgrass | Poaceae
|
| DICA8 | Digitaria californica (Benth.) Henr. | Arizona cottontop | Poaceae
|
| DICH8 | Digitaria chinensis (Nees) A. Camus | Digitaria violascens | Poaceae
|
| DICI | Digitaria ciliaris (Retz.) Koel. | southern crabgrass | Poaceae
|
| DICOP2 | Digitaria cognata (J.A. Schultes) Pilger ssp. pubiflora (Vasey ex L.H. Dewey) Wipff | Digitaria cognata var. pubiflora | Poaceae
|
| DICOA | Digitaria cognata (J.A. Schultes) Pilger var. arenicola (Swallen) R. Webster | Digitaria arenicola | Poaceae
|
| DICOC | Digitaria cognata (J.A. Schultes) Pilger var. cognata | Carolina crabgrass | Poaceae
|
| DICOP | Digitaria cognata (J.A. Schultes) Pilger var. pubiflora Vasey ex L.H. Dewey | Carolina crabgrass | Poaceae
|
| DICO6 | Digitaria cognata (J.A. Schultes) Pilger | Carolina crabgrass | Poaceae
|
| DICR3 | Digitaria cruciata (Nees ex Steudel) A. Camus | crabgrass | Poaceae
|
| DIDE3 | Digitaria decumbens Stent | Digitaria eriantha | Poaceae
|
| DIDI16 | Digitaria didactyla Willd. | crabgrass | Poaceae
|
| DIDI7 | Digitaria diversiflora Swallen | Digitaria bicornis | Poaceae
|
| DIDO | Digitaria dolichophylla Henr. | Caribbean crabgrass | Poaceae
|
| DIEG | Digitaria eggersii (Hack.) Henr. | Eggers' crabgrass | Poaceae
|
| DIERE | Digitaria eriantha Steudel ssp. eriantha | crabgrass | Poaceae
|
| DIERP | Digitaria eriantha Steudel ssp. pentzii (Stent) Kok | woolly fingergrass | Poaceae
|
| DIER | Digitaria eriantha Steud. | pangolagrass | Poaceae
|
| DIEX4 | Digitaria exilis (Kippist) Stapf | fonio | Poaceae
|
| DIFIV | Digitaria filiformis (L.) Koel. var. villosa (Walt.) Fern. | Digitaria villosa | Poaceae
|
| DIFI | Digitaria filiformis (L.) Koel. | slender crabgrass | Poaceae
|
| DIFL | Digitaria floridana A.S. Hitchc. | Florida crabgrass | Poaceae
|
| DIFU | Digitaria fuscescens (J. Presl) Henr. | yellow crabgrass | Poaceae
|
| DIGR | Digitaria gracillima (Scribn.) Fern. | longleaf crabgrass | Poaceae
|
| DIHI3 | Digitaria hitchcockii (Chase) Stuckert | shortleaf crabgrass | Poaceae
|
| DIHO | Digitaria horizontalis Willd. | Jamaican crabgrass | Poaceae
|
| DIIB2 | Digitaria iburua Stapf | black fonio | Poaceae
|
| DIIN2 | Digitaria insularis (L.) Mez ex Ekman | sourgrass | Poaceae
|
| DIISM | Digitaria ischaemum (Schreb.) Schreb. ex Muhl. var. mississippiensis (Gattinger) Fern. | Digitaria ischaemum | Poaceae
|
| DIISV | Digitaria ischaemum (Schreb.) Schreb. ex Muhl. var. violascens (Link) Radford | Digitaria violascens | Poaceae
|
| DIIS | Digitaria ischaemum (Schreb.) Schreb. ex Muhl. | smooth crabgrass | Poaceae
|
| DILA13 | Digitaria laeviglumis Fern. | Digitaria filiformis | Poaceae
|
| DILO2 | Digitaria longiflora (Retz.) Pers. | Indian crabgrass | Poaceae
|
| DIMA16 | Digitaria macroglossa Henr. | Digitaria natalensis | Poaceae
|
| DIMI6 | Digitaria microbachne (J. Presl) Henr. | Digitaria setigera | Poaceae
|
| DIMI3 | Digitaria milanjiana (Rendle) Stapf | Madagascar crabgrass | Poaceae
|
| DINA2 | Digitaria natalensis Stent | Natal crabgrass | Poaceae
|
| DINU | Digitaria nuda Schumacher | naked crabgrass | Poaceae
|
| DIPA4 | Digitaria panicea (Sw.) Urban | millet crabgrass | Poaceae
|
| DIPA14 | Digitaria paspaloides Michx. | Paspalum distichum | Poaceae
|
| DIPA6 | Digitaria patens (Swallen) Henr. | Texas cottontop | Poaceae
|
| DIPA5 | Digitaria pauciflora A.S. Hitchc. | twospike crabgrass | Poaceae
|
| DIPE | Digitaria pentzii Stent | Digitaria eriantha | Poaceae
|
| DIPO5 | Digitaria polevansii Stent | Digitaria seriata | Poaceae
|
| DIPRM | Digitaria pruriens (Fisch. ex Trin.) B�se var. microbachne (J. Presl) Fosberg | Digitaria setigera | Poaceae
|
| DIPR | Digitaria pruriens (Fisch. ex Trin.) B�se | Digitaria setigera | Poaceae
|
| DIRA5 | Digitaria radicosa (Presl) Miq. | trailing crabgrass | Poaceae
|
| DIRU | Digitaria runyonii A.S. Hitchc. | Digitaria texana | Poaceae
|
| DISAC | Digitaria sanguinalis (L.) Scop. var. ciliaris (Retz.) Parl. | Digitaria ciliaris | Poaceae
|
| DISAM2 | Digitaria sanguinalis (L.) Scop. var. marginata (Link) Fern. | Digitaria ciliaris | Poaceae
|
| DISAR3 | Digitaria sanguinalis (L.) Scop. var. rhachiseta (Henr.) Boivin | Digitaria ciliaris | Poaceae
|
| DISA | Digitaria sanguinalis (L.) Scop. | hairy crabgrass | Poaceae
|
| DISC5 | Digitaria scalarum (Schweinf.) Chiov. | Digitaria abyssinica | Poaceae
|
| DISE16 | Digitaria seriata Stapf | crabgrass | Poaceae
|
| DISE3 | Digitaria serotina (Walt.) Michx. | dwarf crabgrass | Poaceae
|
| DISE6 | Digitaria setigera Roth ex Roemer & J.A. Schultes | East Indian crabgrass | Poaceae
|
| DISE17 | Digitaria setivalva Stent | crabgrass | Poaceae
|
| DISI2 | Digitaria similis Beetle ex Gould | roadside crabgrass | Poaceae
|