| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| DIOR | Dicentra oregona Eastw. | Dicentra formosa ssp. oregona | Fumariaceae
|
| DIPA | Dicentra pauciflora S. Wats. | shorthorn steer's-head | Fumariaceae
|
| DISP3 | Dicentra spectabilis (L.) Lem. | Lamprocapnos spectabilis | Fumariaceae
|
| DIUN | Dicentra uniflora Kellogg | longhorn steer's-head | Fumariaceae
|
| DICEN | Dicentra Bernh. | bleeding heart | Fumariaceae
|
| DICH4 | Dicerandra christmanii R.B. Huck & Judd | Lake Wales balm | Lamiaceae
|
| DICO5 | Dicerandra cornutissima R.B. Huck | longspur balm | Lamiaceae
|
| DIDE5 | Dicerandra densiflora Benth. | Florida balm | Lamiaceae
|
| DIFR | Dicerandra frutescens Shinners | scrub balm | Lamiaceae
|
| DIIM | Dicerandra immaculata Lakela | spotless balm | Lamiaceae
|
| DILIL2 | Dicerandra linearifolia (Ell.) Benth. var. linearifolia | coastalplain balm | Lamiaceae
|
| DILIR | Dicerandra linearifolia (Ell.) Benth. var. robustior R.B. Huck | coastalplain balm | Lamiaceae
|
| DILI3 | Dicerandra linearifolia (Ell.) Benth. | coastalplain balm | Lamiaceae
|
| DIOD | Dicerandra odoratissima Harper | rose balm | Lamiaceae
|
| DIRA2 | Dicerandra radfordiana R.B. Huck | Radford's balm | Lamiaceae
|
| DITH3 | Dicerandra �thinicola H.A. Miller (pro sp.) | | Lamiaceae
|
| DICER | Dicerandra Benth. | balm | Lamiaceae
|
| DIEC | Dichaea echinocarpa (Sw.) Lindl. | Dichaea pendula | Orchidaceae
|
| DIHY | Dichaea hystricina Reichenb. f. | arboreal leafystem orchid | Orchidaceae
|
| DILA23 | Dichaea latifolia Lindl. | mountain leafystem orchid | Orchidaceae
|
| DIMU3 | Dichaea muricata auct. non (Sw.) Lindl. p.p. | Dichaea latifolia | Orchidaceae
|
| DIPE9 | Dichaea pendula (Aubl.) Cogn. | Swartz's leafystem orchid | Orchidaceae
|
| DISW2 | Dichaea swartzii (C. Schweinf.) Garay & Sweet | Dichaea pendula | Orchidaceae
|
| DICHA4 | Dichaea Lindl. | leafystem orchid | Orchidaceae
|
| DICA2 | Dichaetophora campestris Gray | plainsdaisy | Asteraceae
|
| DICHA | Dichaetophora Gray | dichaetophora | Asteraceae
|
| DIAC | Dichanthelium aciculare (Desv. ex Poir.) Gould & C.A. Clark | needleleaf rosette grass | Poaceae
|
| DIACA | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. acuminatum | tapered rosette grass | Poaceae
|
| DIACD | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. densiflorum (Rand & Redf.) Gould & C.A. Clark | Dichanthelium spretum | Poaceae
|
| DIACF | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. fasciculatum (Torr.) Freckmann | western panicgrass | Poaceae
|
| DIACI | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. implicatum (Scribn.) Gould & C.A. Clark | Dichanthelium acuminatum var. fasciculatum | Poaceae
|
| DIACL | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. lindheimeri (Nash) Gould & C.A. Clark | Lindheimer panicgrass | Poaceae
|
| DIACL2 | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. longiligulatum (Nash) Gould & C.A. Clark | Dichanthelium longiligulatum | Poaceae
|
| DIACS | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. sericeum (Schmoll) Freckmann | Pacific panicgrass | Poaceae
|
| DIACT2 | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. thermale (Boland.) Freckmann | Geysers panicgrass | Poaceae
|
| DIACT | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. thurowii (Scribn. & J.G. Sm.) Gould & C.A. Clark | Thurow's panicgrass | Poaceae
|
| DIACV2 | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. villosum (Gray) Gould & C.A. Clark | Dichanthelium villosissimum var. villosissimum | Poaceae
|
| DIACW | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. wrightianum (Scribn.) Gould & C.A. Clark | Dichanthelium wrightianum | Poaceae
|
| DIAC2 | Dichanthelium acuminatum (Sw.) Gould & C.A. Clark | tapered rosette grass | Poaceae
|
| DIAN4 | Dichanthelium angustifolium (Ell.) Gould | Dichanthelium aciculare | Poaceae
|
| DIBO | Dichanthelium boreale (Nash) Freckmann | northern panicgrass | Poaceae
|
| DIBOM | Dichanthelium boscii (Poir.) Gould & C.A. Clark var. molle (Vasey) Mohlenbrock | Dichanthelium boscii | Poaceae
|
| DIBO2 | Dichanthelium boscii (Poir.) Gould & C.A. Clark | Bosc's panicgrass | Poaceae
|
| DICL | Dichanthelium clandestinum (L.) Gould | deertongue | Poaceae
|
| DICO12 | Dichanthelium columbianum (Scribn.) Freckmann | Dichanthelium sabulorum var. thinium | Poaceae
|
| DICOE | Dichanthelium commonsianum (Ashe) Freckmann var. euchlamydeum (Shinners) Freckmann | Dichanthelium sabulorum var. patulum | Poaceae
|
| DICO11 | Dichanthelium commonsianum (Ashe) Freckmann | Dichanthelium ovale var. addisonii | Poaceae
|
| DICOA2 | Dichanthelium commutatum (J.A. Schultes) Gould var. ashei (Pearson ex Ashe) Mohlenbrock | Dichanthelium commutatum | Poaceae
|
| DICO2 | Dichanthelium commutatum (J.A. Schultes) Gould | variable panicgrass | Poaceae
|
| DICO3 | Dichanthelium conjugens (Skottsberg) C.A. Clark & Gould | Dichanthelium hillebrandianum | Poaceae
|
| DICO4 | Dichanthelium consanguineum (Kunth) Gould & C.A. Clark | blood panicgrass | Poaceae
|
| DICY | Dichanthelium cynodon (Reichardt) C.A. Clark & Gould | tussock panicgrass | Poaceae
|
| DIDEP | Dichanthelium depauperatum (Muhl.) Gould var. perlorgum (Nash) Boivin | Dichanthelium linearifolium | Poaceae
|
| DIDE4 | Dichanthelium depauperatum (Muhl.) Gould | starved panicgrass | Poaceae
|
| DIDIB | Dichanthelium dichotomum (L.) Gould var. breve (A.S. Hitchc. & Chase) Gould & C.A. Clark | cypress panicgrass | Poaceae
|
| DIDID | Dichanthelium dichotomum (L.) Gould var. dichotomum | cypress panicgrass | Poaceae
|
| DIDIE | Dichanthelium dichotomum (L.) Gould var. ensifolium (Baldw. ex Ell.) Gould & C.A. Clark | cypress panicgrass | Poaceae
|
| DIDIG | Dichanthelium dichotomum (L.) Gould var. glabrifolium (Nash) Gould & C.A. Clark | cypress panicgrass | Poaceae
|
| DIDIT | Dichanthelium dichotomum (L.) Gould var. tenue (Muhl.) Gould & C.A. Clark | cypress panicgrass | Poaceae
|
| DIDI6 | Dichanthelium dichotomum (L.) Gould | cypress panicgrass | Poaceae
|
| DIENB | Dichanthelium ensifolium (Baldw. ex Ell.) Gould var. breve (A.S. Hitchc. & Chase) B.F. Hansen & Wunderlin | Dichanthelium dichotomum var. breve | Poaceae
|
| DIENU | Dichanthelium ensifolium (Baldw. ex Ell.) Gould var. unciphyllum (Trin.) B.F. Hansen & Wunderlin | Dichanthelium dichotomum var. tenue | Poaceae
|
| DIEN | Dichanthelium ensifolium (Baldw. ex Ell.) Gould | Dichanthelium dichotomum var. ensifolium | Poaceae
|
| DIER4 | Dichanthelium erectifolium (Nash) Gould & C.A. Clark | erectleaf panicgrass | Poaceae
|
| DIFO2 | Dichanthelium forbesii (A.S. Hitchc.) C.A. Clark & Gould | Dichanthelium cynodon | Poaceae
|
| DIHI2 | Dichanthelium hillebrandianum (A.S. Hitchc.) C.A. Clark & Gould | bog rosette grass | Poaceae
|
| DIHI13 | Dichanthelium hirstii (Swallen) Kartesz, comb. nov. ined. | Hirst's panicgrass | Poaceae
|
| DIIS2 | Dichanthelium isachnoides (Munro ex Hbd.) C.A. Clark & Gould | Maui rosette grass | Poaceae
|
| DIJO | Dichanthelium joorii (Vasey) Mohlenbrock | Dichanthelium commutatum | Poaceae
|
| DIKO | Dichanthelium koolauense (St. John & Hosaka) C.A. Clark & Gould | Koolau rosette grass | Poaceae
|
| DILAF | Dichanthelium lanuginosum (Ell.) Gould var. fasciculatum (Torr.) Spellenberg | Dichanthelium acuminatum var. fasciculatum | Poaceae
|
| DILAL2 | Dichanthelium lanuginosum (Ell.) Gould var. lindheimeri (Nash) Fern. | Dichanthelium acuminatum var. lindheimeri | Poaceae
|
| DILAT | Dichanthelium lanuginosum (Ell.) Gould var. thermale (Boland.) Spellenberg | Dichanthelium acuminatum var. thermale | Poaceae
|
| DILAV | Dichanthelium lanuginosum (Ell.) Gould var. villosissimum (Nash) Gould | Dichanthelium villosissimum var. villosissimum | Poaceae
|
| DILA11 | Dichanthelium lanuginosum (Ell.) Gould | Dichanthelium acuminatum var. fasciculatum | Poaceae
|
| DILA8 | Dichanthelium latifolium (L.) Gould & C.A. Clark | broadleaf rosette grass | Poaceae
|
| DILA9 | Dichanthelium laxiflorum (Lam.) Gould | openflower rosette grass | Poaceae
|
| DILE2 | Dichanthelium leibergii (Vasey) Freckmann | Leiberg's panicum | Poaceae
|
| DILEG | Dichanthelium leucoblepharis (Trin.) Gould & C.A. Clark var. glabrescens (Griseb.) Gould & C.A. Clark | Dichanthelium strigosum var. glabrescens | Poaceae
|
| DILEP | Dichanthelium leucoblepharis (Trin.) Gould & C.A. Clark var. pubescens (Vasey) Gould & C.A. Clark | Dichanthelium strigosum var. strigosum | Poaceae
|
| DILE3 | Dichanthelium leucoblepharis (Trin.) Gould & C.A. Clark | Dichanthelium strigosum var. leucoblepharis | Poaceae
|
| DILE4 | Dichanthelium leucothrix (Nash) Freckmann | rough panicgrass | Poaceae
|
| DILI5 | Dichanthelium lindheimeri (Nash) Gould | Dichanthelium acuminatum var. lindheimeri | Poaceae
|
| DILIW | Dichanthelium linearifolium (Scribn. ex Nash) Gould var. werneri (Scribn.) Mohlenbrock | Dichanthelium linearifolium | Poaceae
|
| DILI2 | Dichanthelium linearifolium (Scribn. ex Nash) Gould | slimleaf panicgrass | Poaceae
|
| DILO4 | Dichanthelium longiligulatum (Nash) Freckmann | coastalplain panicgrass | Poaceae
|
| DIMA5 | Dichanthelium malacophyllum (Nash) Gould | softleaf rosette grass | Poaceae
|
| DIMA9 | Dichanthelium mattamuskeetense (Ashe) Mohlenbrock | Dichanthelium dichotomum var. dichotomum | Poaceae
|
| DIME2 | Dichanthelium meridionale (Ashe) Freckmann | matting rosette grass | Poaceae
|
| DIMI5 | Dichanthelium microcarpon (Muhl. ex Ell.) Mohlenbrock | Dichanthelium dichotomum var. dichotomum | Poaceae
|
| DINI2 | Dichanthelium nitidum (Lam.) Mohlenbrock | Dichanthelium dichotomum var. dichotomum | Poaceae
|
| DINO | Dichanthelium nodatum (A.S. Hitchc. & Chase) Gould | Sarita rosette grass | Poaceae
|
| DIOLH | Dichanthelium oligosanthes (J.A. Schultes) Gould var. helleri (Nash) Mohlenbrock | Dichanthelium oligosanthes var. scribnerianum | Poaceae
|
| DIOLO | Dichanthelium oligosanthes (J.A. Schultes) Gould var. oligosanthes | Heller's rosette grass | Poaceae
|
| DIOLS | Dichanthelium oligosanthes (J.A. Schultes) Gould var. scribnerianum (Nash) Gould | Scribner's rosette grass | Poaceae
|
| DIOLW | Dichanthelium oligosanthes (J.A. Schultes) Gould var. wilcoxianum (Vasey) Gould & C.A. Clark | Dichanthelium wilcoxianum | Poaceae
|
| DIOL | Dichanthelium oligosanthes (J.A. Schultes) Gould | Heller's rosette grass | Poaceae
|
| DIOVA | Dichanthelium ovale (Ell.) Gould & C.A. Clark var. addisonii (Nash) Gould & C.A. Clark | Addison's rosette grass | Poaceae
|
| DIOVO | Dichanthelium ovale (Ell.) Gould & C.A. Clark var. ovale | eggleaf rosette grass | Poaceae
|
| DIOV | Dichanthelium ovale (Ell.) Gould & C.A. Clark | eggleaf rosette grass | Poaceae
|
| DIPE4 | Dichanthelium pedicellatum (Vasey) Gould | cedar rosette grass | Poaceae
|