| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| DIPHY3 | Diphyscium Mohr | diphyscium moss | Buxbaumiaceae
|
| DIAC3 | Diplachne acuminata Nash | Leptochloa fusca ssp. fascicularis | Poaceae
|
| DICH13 | Diplachne chloridiformis Hack. ex Stuck. | Leptochloa chloridiformis | Poaceae
|
| DIDU | Diplachne dubia (Kunth) Scribn. | Leptochloa dubia | Poaceae
|
| DIFA4 | Diplachne fascicularis (Lam.) Beauv. | Leptochloa fusca ssp. fascicularis | Poaceae
|
| DIHA4 | Diplachne halei Nash | Leptochloa panicoides | Poaceae
|
| DIMA10 | Diplachne maritima Bickn. | Leptochloa fusca ssp. fascicularis | Poaceae
|
| DIPA13 | Diplachne panicoides (J. Presl) McNeill | Leptochloa panicoides | Poaceae
|
| DIPE10 | Diplachne peacockii Maiden & Betche | Leptochloa decipiens ssp. peacockii | Poaceae
|
| DIUN5 | Diplachne uninervia (J. Presl) Parodi | Leptochloa fusca ssp. uninervia | Poaceae
|
| DIVI9 | Diplachne viscida Scribn. | Leptochloa viscida | Poaceae
|
| DIAL12 | Diplactis alpina (L.) Semple p.p. | Aster alpinus var. vierhapperi | Asteraceae
|
| DIAR10 | Diplacus arachnoideus Greene | Diplacus longiflorus | Scrophulariaceae
|
| DIAR6 | Diplacus aridus Abrams | San Diego bush monkeyflower | Scrophulariaceae
|
| DIAUA | Diplacus aurantiacus (W. Curtis) Jepson ssp. aurantiacus | orange bush monkeyflower | Scrophulariaceae
|
| DIAUA2 | Diplacus aurantiacus (W. Curtis) Jepson ssp. australis (McMinn) R.M. Beeks | orange bush monkeyflower | Scrophulariaceae
|
| DIAU | Diplacus aurantiacus (W. Curtis) Jepson | orange bush monkeyflower | Scrophulariaceae
|
| DIAU2 | Diplacus australis McMinn | Diplacus aurantiacus ssp. australis | Scrophulariaceae
|
| DICA12 | Diplacus calycinus Eastw. | Kaweah River bush monkeyflower | Scrophulariaceae
|
| DICA16 | Diplacus cardinalis (Dougl. ex Benth.) Groenl. | Mimulus cardinalis | Scrophulariaceae
|
| DICL2 | Diplacus clevelandii (Brandeg.) Greene | Cleveland's bush monkeyflower | Scrophulariaceae
|
| DIFA3 | Diplacus fasciculatus (Pennell) McMinn | Santa Lucia Mountain bush monkeyflower | Scrophulariaceae
|
| DIGLA | Diplacus glutinosus (J.C. Wendl.) Nutt. var. aurantiacus (W. Curtis) Lindl. | Diplacus aurantiacus ssp. aurantiacus | Scrophulariaceae
|
| DIGLG | Diplacus glutinosus (J.C. Wendl.) Nutt. var. grandiflorus Lindl. | Diplacus grandiflorus | Scrophulariaceae
|
| DIGLP | Diplacus glutinosus (J.C. Wendl.) Nutt. var. puniceus (Nutt.) Benth. | Diplacus puniceus | Scrophulariaceae
|
| DIGL5 | Diplacus glutinosus (J.C. Wendl.) Nutt. | Diplacus aurantiacus ssp. aurantiacus | Scrophulariaceae
|
| DIGR5 | Diplacus grandiflorus (Lindl.) Groenl. | largeflower bush monkeyflower | Scrophulariaceae
|
| DIGR6 | Diplacus grandiflorus Greene p.p., non (Lindl.) Groenl. | Diplacus fasciculatus | Scrophulariaceae
|
| DIGR6 | Diplacus grandiflorus Greene p.p., non (Lindl.) Groenl. | Diplacus grandiflorus | Scrophulariaceae
|
| DILA16 | Diplacus latifolius Nutt. | Diplacus aurantiacus ssp. aurantiacus | Scrophulariaceae
|
| DILE5 | Diplacus leptanthus Nutt. | Diplacus aurantiacus ssp. aurantiacus | Scrophulariaceae
|
| DILI4 | Diplacus linearis (Benth.) Greene | chaparral bush monkeyflower | Scrophulariaceae
|
| DILO5 | Diplacus lompocensis McMinn | Lompoc Mesa bush monkeyflower | Scrophulariaceae
|
| DILOC | Diplacus longiflorus Nutt. var. calycinus (Eastw.) Jepson | Diplacus calycinus | Scrophulariaceae
|
| DILOL | Diplacus longiflorus Nutt. var. linearis (Benth.) McMinn | Diplacus linearis | Scrophulariaceae
|
| DILOR | Diplacus longiflorus Nutt. var. rutilus (A.L. Grant) McMinn | Diplacus rutilus | Scrophulariaceae
|
| DILO6 | Diplacus longiflorus Nutt. | southern bush monkeyflower | Scrophulariaceae
|
| DIPA10 | Diplacus parviflorus Greene | island bush monkeyflower | Scrophulariaceae
|
| DIPU4 | Diplacus puniceus Nutt. | red bush monkeyflower | Scrophulariaceae
|
| DIRU3 | Diplacus rutilus (A.L. Grant) McMinn | Santa Susana bush monkeyflower | Scrophulariaceae
|
| DIPLA3 | Diplacus Nutt. | bush monkeyflower | Scrophulariaceae
|
| DIBE3 | Diplanthera beaudettei den Hartog | Halodule beaudettei | Cymodoceaceae
|
| DIWR2 | Diplanthera wrightii (Aschers.) Aschers. | Halodule beaudettei | Cymodoceaceae
|
| DIRU9 | Diplasiolejeunea rudolphiana Steph. | | Lejeuneaceae
|
| DIPLA4 | Diplasiolejeunea (Spruce) Schiffn. | | Lejeuneaceae
|
| DIAC4 | Diplazium acrostichoides (Sw.) Butters | Deparia acrostichoides | Dryopteridaceae
|
| DIAR8 | Diplazium arboreum auct. non (Willd.) K. Presl | Diplazium cristatum | Dryopteridaceae
|
| DIAR9 | Diplazium arnottii Brack. | Diplazium meyenianum | Dryopteridaceae
|
| DICE | Diplazium centripetale (Baker) Maxon | royal twinsorus fern | Dryopteridaceae
|
| DICR | Diplazium cristatum (Desr.) Alston | crested twinsorus fern | Dryopteridaceae
|
| DIES | Diplazium esculentum (Retz.) Sw. | vegetable fern | Dryopteridaceae
|
| DIEX3 | Diplazium expansum Willd. | great fern | Dryopteridaceae
|
| DIFE2 | Diplazium fenzlianum (Luerss.) C. Christens. | Deparia fenzliana | Dryopteridaceae
|
| DIGR2 | Diplazium grandifolium (Sw.) Sw. | largeleaf twinsorus fern | Dryopteridaceae
|
| DIHY2 | Diplazium hymenodes (Mett.) A.& D. L�ve | peacock fern | Dryopteridaceae
|
| DIJA | Diplazium japonicum auct. non (Thunb.) Bedd. | Deparia petersonii | Dryopteridaceae
|
| DIKA | Diplazium kaalaanum (Copeland) C. Christens. | Deparia kaalaana | Dryopteridaceae
|
| DILH | Diplazium lherminieri Hieron. | L'herminier's twinsorus fern | Dryopteridaceae
|
| DILO3 | Diplazium lonchophyllum Kunze | lanceleaf twinsorus fern | Dryopteridaceae
|
| DIMA4 | Diplazium marginale (Hbd.) C. Christens. | Deparia marginalis | Dryopteridaceae
|
| DIME | Diplazium meyenianum K. Presl | Meyen's twinsorus fern | Dryopteridaceae
|
| DIMO4 | Diplazium molokaiense Robins. | Molokai twinsorus fern | Dryopteridaceae
|
| DIPL2 | Diplazium plantaginifolium (L.) Urban | plantainleaf twinsorus fern | Dryopteridaceae
|
| DIPY | Diplazium pycnocarpon (Spreng.) Broun | glade fern | Dryopteridaceae
|
| DIRI2 | Diplazium riedelianum (Bong. ex Kunze) K. Presl | Riedel's twinsorus fern | Dryopteridaceae
|
| DISA3 | Diplazium sandwichianum (K. Presl) Diels | Hawai'i twinsorus fern | Dryopteridaceae
|
| DIST2 | Diplazium striatum (L.) K. Presl | striped twinsorus fern | Dryopteridaceae
|
| DIUNH | Diplazium unilobum (Poir.) Hieron. var. hymenodes (Mett.) Maxon | Diplazium hymenodes | Dryopteridaceae
|
| DIUN4 | Diplazium unilobum (Poir.) Hieron. | singlelobe twinsorus fern | Dryopteridaceae
|
| DIVE4 | Diplazium verapax (J. Sm.) Hieron. | Diplazium riedelianum | Dryopteridaceae
|
| DIPLA2 | Diplazium Sw. | twinsorus fern | Dryopteridaceae
|
| DISE12 | Diplochita serrulata DC. | Miconia serrulata | Melastomataceae
|
| DICA21 | Diploicia canescens (Dickson) A. Massal. | diploicia lichen | Physciaceae
|
| DIPLO4 | Diploicia A. Massal. | diploicia | Physciaceae
|
| DIER6 | Diplopappus ericoides Less. | Ericameria ericoides | Asteraceae
|
| DIIN4 | Diplopappus incanus Lindl. | Machaeranthera canescens ssp. canescens var. incana | Asteraceae
|
| DILU2 | Diplopappus lutescens Lindl. ex DC. | Oligoneuron lutescens | Asteraceae
|
| DIPI4 | Diplopappus pinnatifidus Hook. | Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida | Asteraceae
|
| DIAL11 | Diplophyllum albicans (L.) Dumort. | | Scapaniaceae
|
| DIAN7 | Diplophyllum andrewsii A. Evans | | Scapaniaceae
|
| DIAPA | Diplophyllum apiculatum (A. Evans) Steph. var. apiculatum | | Scapaniaceae
|
| DIAPT | Diplophyllum apiculatum (A. Evans) Steph. var. taxifolioides R. M. Schust. | | Scapaniaceae
|
| DIAP4 | Diplophyllum apiculatum (A. Evans) Steph. | | Scapaniaceae
|
| DIIM2 | Diplophyllum imbricatum (M. Howe) M�ll. Frib. | | Scapaniaceae
|
| DIMI11 | Diplophyllum microdontum (Mitt.) H. Buch | | Scapaniaceae
|
| DIOB4 | Diplophyllum obtusatum (R. M. Schust.) R. M. Schust. | | Scapaniaceae
|
| DIOB5 | Diplophyllum obtusifolium (Hook.) Dumort. | | Scapaniaceae
|
| DIPL3 | Diplophyllum plicatum Lindb. | | Scapaniaceae
|
| DITAM | Diplophyllum taxifolium (Wahlenb.) Dumort. var. macrosticta H. Buch | | Scapaniaceae
|
| DITAM2 | Diplophyllum taxifolium (Wahlenb.) Dumort. var. mucronatum R. M. Schust. | | Scapaniaceae
|
| DITAT | Diplophyllum taxifolium (Wahlenb.) Dumort. var. taxifolium | | Scapaniaceae
|
| DITA3 | Diplophyllum taxifolium (Wahlenb.) Dumort. | | Scapaniaceae
|
| DIPLO3 | Diplophyllum (Dumort.) Dumort. nom.cons. | | Scapaniaceae
|
| DIPI3 | Diplopterygium pinnatum (Kunze) Nakai | scrambling fern | Gleicheniaceae
|
| DIPLO2 | Diplopterygium (Diels) Nakai | diplopterygium | Gleicheniaceae
|
| DIAC5 | Diploschistes actinostomus (Ach.) Zalhbr. | crater lichen | Thelotremataceae
|
| DIAE | Diploschistes aeneus (Mull. Arg.) Lumbsch | crater lichen | Thelotremataceae
|
| DIAL8 | Diploschistes albissimus (Ach.) Dalla Torre & Sarnth. | Diploschistes diacapsis | Thelotremataceae
|
| DIAR12 | Diploschistes arabiensis Lumbsch | crater lichen | Thelotremataceae
|
| DIBA3 | Diploschistes badius Lumbsch & Elix | crater lichen | Thelotremataceae
|
| DIBI5 | Diploschistes bisporus (Bagl.) J. Steiner | crater lichen | Thelotremataceae
|