| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| NYMI | Nymphaea minor (Sims) DC. | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODO | Nymphaea odorata Ait. ssp. odorata | American white waterlily | Nymphaeaceae
|
| NYODT | Nymphaea odorata Ait. ssp. tuberosa (Paine) Wiersma & Hellquist | American white waterlily | Nymphaeaceae
|
| NYODG | Nymphaea odorata Ait. var. gigantea Tricker | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODG2 | Nymphaea odorata Ait. var. godfreyi Ward | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODM | Nymphaea odorata Ait. var. maxima (Conrad) Boivin | Nymphaea odorata ssp. tuberosa | Nymphaeaceae
|
| NYODM2 | Nymphaea odorata Ait. var. minor Sims | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODR | Nymphaea odorata Ait. var. rosea Pursh | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODS | Nymphaea odorata Ait. var. stenopetala Fern. | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYODV | Nymphaea odorata Ait. var. villosa Caspary | Nymphaea odorata ssp. odorata | Nymphaeaceae
|
| NYOD | Nymphaea odorata Ait. | American white waterlily | Nymphaeaceae
|
| NYOR | Nymphaea orbiculata Small | Nuphar lutea ssp. orbiculata | Nymphaeaceae
|
| NYPO | Nymphaea polysepala (Engelm.) Greene | Nuphar lutea ssp. polysepala | Nymphaeaceae
|
| NYPU2 | Nymphaea pulchella DC. | Nymphaea ampla var. pulchella | Nymphaeaceae
|
| NYRU2 | Nymphaea rubrodisca (Morong) Greene | Nuphar lutea ssp. rubrodisca | Nymphaeaceae
|
| NYRU | Nymphaea ?rudgeana G.F.W. Mey. | Rudge's waterlily | Nymphaeaceae
|
| NYSA | Nymphaea sagittifolia Walt. | Nuphar lutea ssp. sagittifolia | Nymphaeaceae
|
| NYTEL | Nymphaea tetragona Georgi ssp. leibergii (Morong) Porsild | Nymphaea leibergii | Nymphaeaceae
|
| NYTEL2 | Nymphaea tetragona Georgi var. leibergii (Morong) Boivin | Nymphaea leibergii | Nymphaeaceae
|
| NYTE | Nymphaea tetragona Georgi | pygmy waterlily | Nymphaeaceae
|
| NYTH | Nymphaea �thiona Ward | | Nymphaeaceae
|
| NYTU | Nymphaea tuberosa Paine | Nymphaea odorata ssp. tuberosa | Nymphaeaceae
|
| NYUL | Nymphaea ulvacea Mill. & Standl. | Nuphar lutea ssp. ulvacea | Nymphaeaceae
|
| NYZA | Nymphaea zanzibariensis Caspary | Nymphaea capensis var. zanzibariensis | Nymphaeaceae
|
| NYMPH | Nymphaea L. | waterlily | Nymphaeaceae
|
| NYAQ | Nymphoides aquatica (J.F. Gmel.) Kuntze | big floatingheart | Menyanthaceae
|
| NYCO | Nymphoides cordata (Ell.) Fern. | little floatingheart | Menyanthaceae
|
| NYHU | Nymphoides humboldtiana (Kunth) Kuntze | Nymphoides indica | Menyanthaceae
|
| NYIN | Nymphoides indica (L.) Kuntze | water snowflake | Menyanthaceae
|
| NYLA | Nymphoides lacunosa (Vent.) Kuntze | Nymphoides cordata | Menyanthaceae
|
| NYNY | Nymphoides nymphaeoides (L.) Britt. | Nymphoides peltata | Menyanthaceae
|
| NYPE | Nymphoides peltata (Gmel.) Kuntze | yellow floatingheart | Menyanthaceae
|
| NYMPH2 | Nymphoides Hill | floatingheart | Menyanthaceae
|
| NYAD2 | Nymphozanthus advena (Ait.) Fern. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NYOZ | Nymphozanthus ozarkanus (Mill. & Standl.) Palmer & Steyermark | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NYPO2 | Nymphozanthus polysepalus (Engelm.) Fern. | Nuphar lutea ssp. polysepala | Nymphaeaceae
|
| NYRU3 | Nymphozanthus rubrodiscus (Morong) Fern. | Nuphar lutea ssp. rubrodisca | Nymphaeaceae
|
| NYSA2 | Nymphozanthus sagittifolius (Walt.) Fern. | Nuphar lutea ssp. sagittifolia | Nymphaeaceae
|
| NYFR2 | Nypa fruticans Wurmb | nipa palm | Arecaceae
|
| NYPA | Nypa Steck | | Arecaceae
|
| NYAC | Nyssa acuminata Small | Nyssa ogeche | Nyssaceae
|
| NYAQ2 | Nyssa aquatica L. | water tupelo | Nyssaceae
|
| NYBI | Nyssa biflora Walt. | swamp tupelo | Nyssaceae
|
| NYOG | Nyssa ogeche Bartr. ex Marsh. | Ogeechee tupelo | Nyssaceae
|
| NYSYB | Nyssa sylvatica Marsh. var. biflora (Walt.) Sarg. | Nyssa biflora | Nyssaceae
|
| NYSYC | Nyssa sylvatica Marsh. var. caroliniana (Poir.) Fern. | Nyssa sylvatica | Nyssaceae
|
| NYSYD | Nyssa sylvatica Marsh. var. dilatata Fern. | Nyssa sylvatica | Nyssaceae
|
| NYSYT | Nyssa sylvatica Marsh. var. typica Fern. | Nyssa sylvatica | Nyssaceae
|
| NYSYU | Nyssa sylvatica Marsh. var. ursina (Small) Wen & Stuessy | Nyssa ursina | Nyssaceae
|
| NYSY | Nyssa sylvatica Marsh. | blackgum | Nyssaceae
|
| NYUN | Nyssa uniflora Wangenh. | Nyssa aquatica | Nyssaceae
|
| NYUR2 | Nyssa ursina Small | bear tupelo | Nyssaceae
|
| NYSSA | Nyssa L. | tupelo | Nyssaceae
|
| OAFL | Oakesiella floridana (Chapman) Small | Uvularia floridana | Liliaceae
|
| OAPU | Oakesiella puberula (Michx.) Small | Uvularia puberula | Liliaceae
|
| OASE | Oakesiella sessilifolia (L.) S. Wats. | Uvularia sessilifolia | Liliaceae
|
| OBCO | Oberna commutata (Guss.) S. Ikonnikov | Silene vulgaris | Caryophyllaceae
|
| OBAC | Obione acanthocarpa Torr. | Atriplex acanthocarpa ssp. acanthocarpa | Chenopodiaceae
|
| OBVI | Obolaria virginica L. | Virginia pennywort | Gentianaceae
|
| OBOLA | Obolaria L. | obolaria | Gentianaceae
|
| OCLE2 | Oceanorus leimanthoides (Gray) Small | Zigadenus leimanthoides | Liliaceae
|
| OCAB | Ocellularia abrosella (Nyl.) R. Sant. | Thelotrema abrosellum | Thelotremataceae
|
| OCAM | Ocellularia americana Hale | | Thelotremataceae
|
| OCAU | Ocellularia auberiana (Mont.) Hale | | Thelotremataceae
|
| OCCA3 | Ocellularia carnea (Eckf.) Zahlbr. | Mazosia ocellata | Roccellaceae
|
| OCCA | Ocellularia cavata (Ach.) Mull. Arg. | | Thelotremataceae
|
| OCCO3 | Ocellularia concolor Meyen & Flotow | | Thelotremataceae
|
| OCEM | Ocellularia emersa (Krempelh.) Mull. Arg. | | Thelotremataceae
|
| OCFI | Ocellularia fissa (Nyl.) Hale | | Thelotremataceae
|
| OCFL2 | Ocellularia floridensis Fink | Thelotrema porinoides | Thelotremataceae
|
| OCGL2 | Ocellularia glaucophaea (Krempelh.) Zahlbr. | Myriotrema glaucophaeum | Thelotremataceae
|
| OCGR4 | Ocellularia granulosa (Tuck.) Zahlbr. | | Thelotremataceae
|
| OCLA4 | Ocellularia lathraea (Tuck.) Zahlbr. | Thelotrema lathraeum | Thelotremataceae
|
| OCLE3 | Ocellularia leiostoma Tuck.) R. C. Harris | | Thelotremataceae
|
| OCME2 | Ocellularia meiosperma (Nyl.) Hale | Ocellularia leiostoma | Thelotremataceae
|
| OCMI3 | Ocellularia micropora (Mont.) Mull. Arg. | Myriotrema microporum | Thelotremataceae
|
| OCOB | Ocellularia obturascens (Nyl.) Hale | Myriotrema bahianum | Thelotremataceae
|
| OCPR | Ocellularia praestans (Mull. Arg.) Hale | | Thelotremataceae
|
| OCRE | Ocellularia retispora R. C. Harris | | Thelotremataceae
|
| OCSA4 | Ocellularia sanfordiana (Zahlbr.) Hale | | Thelotremataceae
|
| OCST | Ocellularia stictidea (Nyl.) Vezda | | Thelotremataceae
|
| OCSU4 | Ocellularia subtilis (Tuck.) Riddle | Thelotrema subtile | Thelotremataceae
|
| OCTE | Ocellularia terebratula (Nyl.) Mull. Arg. | Myriotrema terebratulum | Thelotremataceae
|
| OCELL | Ocellularia G. Meyer | ocellularia | Thelotremataceae
|
| OCJA | Ochna jabotapita L. | bird's-eye bush | Ochnaceae
|
| OCKI3 | Ochna kirkii D. Oliver | Ochna thomasiana | Ochnaceae
|
| OCSE2 | Ochna serrulata (Hochst.) Walp. | Mickey Mouse plant | Ochnaceae
|
| OCTH | Ochna thomasiana Engl. & Gilg | | Ochnaceae
|
| OCHNA | Ochna L. | ochna | Ochnaceae
|
| OCPU | Ochrocodon pudicus (Pursh) Rydb. | Fritillaria pudica | Liliaceae
|
| OCAF | Ochrolechia africana Vainio | crabseye lichen | Pertusariaceae
|
| OCAN | Ochrolechia androgyna (Hoffm.) Arnold | crabseye lichen | Pertusariaceae
|
| OCAN2 | Ochrolechia antillarum Brodo | crabseye lichen | Pertusariaceae
|
| OCAR | Ochrolechia arborea (Kreyer) Almb. | tree crabseye lichen | Pertusariaceae
|
| OCBR | Ochrolechia bryophaga (Erichsen) K. Schmitz & Lumbsch | crabseye lichen | Pertusariaceae
|
| OCCA2 | Ochrolechia californica Vers. | Ochrolechia oregonensis | Pertusariaceae
|
| OCEL2 | Ochrolechia elisabethae-kolae Vers. | Ochrolechia frigida | Pertusariaceae
|
| OCFA | Ochrolechia farinacea Howard | farinose crabseye lichen | Pertusariaceae
|
| OCFR60 | Ochrolechia frigida (Sw.) Lynge | cold crabseye lichen | Pertusariaceae
|
| OCGE | Ochrolechia geminipara (Th. Fr.) Vainio | Pertusaria geminipara | Pertusariaceae
|
| OCGO | Ochrolechia gonatodes (Ach.) Rasanen | Ochrolechia frigida | Pertusariaceae
|