| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| DALIB | Dalibarda L. | dalibarda | Rosaceae
|
| DASP4 | Daltonia splachnoides (Sm. in Sm. & Sowerby) Hook. & Tayl. | daltonia moss | Daltoniaceae
|
| DALTO | Daltonia Hook. & Tayl. | daltonia moss | Daltoniaceae
|
| DACA12 | Damasonium californicum Torr. ex Benth. | California damsonium | Alismataceae
|
| DAMAS | Damasonium Hill | damasonium | Alismataceae
|
| DAEL | Danaea elliptica Sm. | Caribbean danafern | Marattiaceae
|
| DAJA2 | Danaea jamaicensis Underwood | Jamaican danafern | Marattiaceae
|
| DAJE | Danaea jenmanii Underwood | Puerto Rico danafern | Marattiaceae
|
| DANO | Danaea nodosa (L.) Sm. | nodeless danafern | Marattiaceae
|
| DAUR2 | Danaea urbanii Maxon | forest danafern | Marattiaceae
|
| DANAE | Danaea Sm. | danafern | Marattiaceae
|
| DAOG | Daniellia ogea (Harms) Rolfe ex Holland | gum copal tree | Fabaceae
|
| DAOL | Daniellia oliveri (Rolfe) Hutch. & Dalziel | African copaiba balsam tree | Fabaceae
|
| DATH6 | Daniellia thurifera Bennett | Niger copal tree | Fabaceae
|
| DANIE | Daniellia Bennett | daniellia | Fabaceae
|
| DAAL3 | Danthonia allenii Austin | Danthonia compressa | Poaceae
|
| DAAM5 | Danthonia americana Scribn. | Danthonia californica | Poaceae
|
| DACAA | Danthonia californica Boland. var. americana (Scribn.) A.S. Hitchc. | Danthonia californica | Poaceae
|
| DACAP3 | Danthonia californica Boland. var. palousensis St. John | Danthonia californica | Poaceae
|
| DACAP4 | Danthonia californica Boland. var. piperi St. John | Danthonia californica | Poaceae
|
| DACA3 | Danthonia californica Boland. | California oatgrass | Poaceae
|
| DACA11 | Danthonia canadensis Baum & Findlay | Danthonia intermedia | Poaceae
|
| DACO | Danthonia compressa Austin ex Peck | flattened oatgrass | Poaceae
|
| DADE | Danthonia decumbens (L.) DC. | common heathgrass | Poaceae
|
| DAEP2 | Danthonia epilis Scribn. | Carolina oatgrass | Poaceae
|
| DAINC | Danthonia intermedia Vasey var. cusickii Williams | Danthonia intermedia | Poaceae
|
| DAIN | Danthonia intermedia Vasey | timber oatgrass | Poaceae
|
| DAPA2 | Danthonia parryi Scribn. | Parry's oatgrass | Poaceae
|
| DAPI | Danthonia pilosa R. Br. | Rytidosperma pilosum | Poaceae
|
| DAPU10 | Danthonia purpurea (Thunb.) Beauv. ex Roemer & J.A. Schultes | Karroochloa purpurea | Poaceae
|
| DASE | Danthonia semiannularis (Labill.) R. Br. | Rytidosperma semiannulare | Poaceae
|
| DASEE | Danthonia sericea Nutt. var. epilis (Scribn.) Blomquist | Danthonia epilis | Poaceae
|
| DASE2 | Danthonia sericea Nutt. | downy danthonia | Poaceae
|
| DASPL | Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes var. longipila Scribn. & Merr. | Danthonia spicata | Poaceae
|
| DASPP | Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes var. pinetorum Piper | Danthonia spicata | Poaceae
|
| DASP2 | Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes | poverty oatgrass | Poaceae
|
| DATH3 | Danthonia thermalis Scribn. | Danthonia spicata | Poaceae
|
| DAUN | Danthonia unispicata (Thurb.) Munro ex Macoun | onespike danthonia | Poaceae
|
| DANTH | Danthonia DC. | oatgrass | Poaceae
|
| DALA11 | Daphne laureola L. | spurgelaurel | Thymelaeaceae
|
| DAME3 | Daphne mezereum L. | paradise plant | Thymelaeaceae
|
| DAPHN2 | Daphne L. | daphne | Thymelaeaceae
|
| DAAMC | Daphnopsis americana (P. Mill.) J.R. Johnston ssp. caribaea (Griseb.) Nevl. | Caribbean burn nose | Thymelaeaceae
|
| DAAM2 | Daphnopsis americana (P. Mill.) J.R. Johnston | burn nose | Thymelaeaceae
|
| DACA14 | Daphnopsis caribaea Griseb. | Daphnopsis americana ssp. caribaea | Thymelaeaceae
|
| DAHE2 | Daphnopsis helleriana Urban | Heller's cieneguillo | Thymelaeaceae
|
| DAPH | Daphnopsis philippiana Krug & Urban | emajagua de sierra | Thymelaeaceae
|
| DAPHN | Daphnopsis Mart. | daphnopsis | Thymelaeaceae
|
| DACA5 | Darlingtonia californica Torr. | California pitcherplant | Sarraceniaceae
|
| DARE3 | Darlingtonia rediviva Torr. | Styrax rediviva | Styracaceae
|
| DARLI | Darlingtonia Torr. | California pitcherplant | Sarraceniaceae
|
| DAPE | Darmera peltata (Torr. ex Benth.) Voss | Indian rhubarb | Saxifragaceae
|
| DARME | Darmera Voss | darmera | Saxifragaceae
|
| DAEX4 | Darwinia exaltata Raf. | Sesbania herbacea | Fabaceae
|
| DAFL3 | Dasiphora floribunda (Pursh) Kartesz, comb. nov. ined. | shrubby cinquefoil | Rosaceae
|
| DAFR3 | Dasiphora fruticosa auct. non (L.) Rydb. | Dasiphora floribunda | Rosaceae
|
| DASIP | Dasiphora Raf. | shrubby cinquefoil | Rosaceae
|
| DACA13 | Dasistoma calycosa Mackenzie & Bush | Aureolaria flava var. flava | Scrophulariaceae
|
| DADI3 | Dasistoma dispersa Small | Aureolaria virginica | Scrophulariaceae
|
| DAFL2 | Dasistoma flava (L.) Wood | Aureolaria flava var. flava | Scrophulariaceae
|
| DAGR4 | Dasistoma grandiflora (Benth.) Wood | Aureolaria grandiflora var. grandiflora | Scrophulariaceae
|
| DALA10 | Dasistoma laevigata (Raf.) Chapman | Aureolaria laevigata | Scrophulariaceae
|
| DAMA | Dasistoma macrophylla (Nutt.) Raf. | mullein foxglove | Scrophulariaceae
|
| DAPA4 | Dasistoma patula Chapman | Aureolaria patula | Scrophulariaceae
|
| DAPE2 | Dasistoma pedicularia (L.) Benth. | Aureolaria pedicularia var. pedicularia | Scrophulariaceae
|
| DASE4 | Dasistoma serrata (Torr. ex Benth.) Small | Aureolaria grandiflora var. serrata | Scrophulariaceae
|
| DAVI4 | Dasistoma virginica (L.) Britt. | Aureolaria virginica | Scrophulariaceae
|
| DASIS | Dasistoma Raf. | dasistoma | Scrophulariaceae
|
| DAHE | Dasylirion heteracanthum I.M. Johnston | TransPecos sotol | Liliaceae
|
| DALE2 | Dasylirion leiophyllum Engelm. ex Trel. | green sotol | Liliaceae
|
| DATE3 | Dasylirion texanum Scheele | Texas sotol | Liliaceae
|
| DAWH2 | Dasylirion wheeleri S. Wats. | common sotol | Liliaceae
|
| DASYL | Dasylirion Zucc. | sotol | Liliaceae
|
| DADA | Dasynotus daubenmirei I.M. Johnston | Rocky Mountain whitethroat | Boraginaceae
|
| DASYN | Dasynotus I.M. Johnston | whitethroat | Boraginaceae
|
| DAPU7 | Dasyochloa pulchella (Kunth) Willd. ex Rydb. | low woollygrass | Poaceae
|
| DASYO | Dasyochloa Willd. ex Rydb. | woollygrass | Poaceae
|
| DAVI2 | Dasypyrum villosum (L.) Coss. & Durieu ex P. Candargy | mosquitograss | Poaceae
|
| DASYP | Dasypyrum (Coss. & Durieu) T. Dur. | mosquitograss | Poaceae
|
| DAAF | Dasystephana affinis (Griseb.) Rydb. | Gentiana affinis | Gentianaceae
|
| DAAN | Dasystephana andrewsii (Griseb.) Small | Gentiana andrewsii var. andrewsii | Gentianaceae
|
| DADE2 | Dasystephana decora (Pollard) Small | Gentiana decora | Gentianaceae
|
| DAGL4 | Dasystephana glauca (Pallas) Rydb. | Gentiana glauca | Gentianaceae
|
| DAGR3 | Dasystephana grayi (Kusnez.) Britt. | Gentiana rubricaulis | Gentianaceae
|
| DAIN4 | Dasystephana interrupta (Greene) Rydb. | Gentiana affinis | Gentianaceae
|
| DALA9 | Dasystephana latifolia (Chapman) Small | Gentiana catesbaei | Gentianaceae
|
| DALI | Dasystephana linearis (Froel.) Britt. | Gentiana linearis | Gentianaceae
|
| DAPA3 | Dasystephana parvifolia (Chapman) Small | Gentiana catesbaei | Gentianaceae
|
| DAPO6 | Dasystephana porphyrio (J.F. Gmel.) Small | Gentiana autumnalis | Gentianaceae
|
| DAPU6 | Dasystephana puberula (Michx.) Small as to type, non sensu Small | Gentiana saponaria var. saponaria | Gentianaceae
|
| DASA2 | Dasystephana saponaria (L.) Small | Gentiana saponaria var. saponaria | Gentianaceae
|
| DATE7 | Dasystephana tenuifolia (Raf.) Pennell | Gentiana pennelliana | Gentianaceae
|
| DAVI3 | Dasystephana villosa (L.) Small | Gentiana villosa | Gentianaceae
|
| DACA16 | Datisca cannabina L. | akalbir | Datiscaceae
|
| DAGL2 | Datisca glomerata (K. Presl) Baill. | Durango root | Datiscaceae
|
| DAHI | Datisca hirta L. | Rhus hirta | Anacardiaceae
|
| DATIS | Datisca L. | datisca | Datiscaceae
|
| DAAR6 | Datura arborea L. | Brugmansia candida | Solanaceae
|
| DACA15 | Datura candida (Pers.) Safford | Brugmansia candida | Solanaceae
|
| DADI2 | Datura discolor Bernh. | desert thorn-apple | Solanaceae
|
| DAFA | Datura fastuosa auct. non L. | Datura inoxia | Solanaceae
|