| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| NOSAL4 | Nototrichium sandwicense (Gray) Hbd. var. lanceolatum Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAL5 | Nototrichium sandwicense (Gray) Hbd. var. latifolium Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAL | Nototrichium sandwicense (Gray) Hbd. var. leptopodum O. Deg. & Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAL2 | Nototrichium sandwicense (Gray) Hbd. var. longispicatum Hbd. | Nototrichium sandwicense | Amaranthaceae
|
| NOSAM | Nototrichium sandwicense (Gray) Hbd. var. macrophyllum Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAM2 | Nototrichium sandwicense (Gray) Hbd. var. mauiense O. Deg. & Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAN | Nototrichium sandwicense (Gray) Hbd. var. niihauense St. John | Nototrichium sandwicense | Amaranthaceae
|
| NOSAO | Nototrichium sandwicense (Gray) Hbd. var. olokeleanum Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAP | Nototrichium sandwicense (Gray) Hbd. var. pulchelloides O. Deg. & Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAP2 | Nototrichium sandwicense (Gray) Hbd. var. pulchellum Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAS | Nototrichium sandwicense (Gray) Hbd. var. subcordatum O. Deg. & Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSAS2 | Nototrichium sandwicense (Gray) Hbd. var. syringifolium Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOSA | Nototrichium sandwicense (Gray) Hbd. | Hawai'i rockwort | Amaranthaceae
|
| NOVIK | Nototrichium viride Hbd. var. kalaupapae St. John | Nototrichium sandwicense | Amaranthaceae
|
| NOVIO | Nototrichium viride Hbd. var. oblongifolium Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOVIS | Nototrichium viride Hbd. var. subtruncatum Sherff | Nototrichium sandwicense | Amaranthaceae
|
| NOVI | Nototrichium viride Hbd. | Nototrichium sandwicense | Amaranthaceae
|
| NOTOT | Nototrichium (Gray) Hbd. | rockwort | Amaranthaceae
|
| NOGL | Novosieversia glacialis (J.E. Adams) Bolle | Geum glaciale | Rosaceae
|
| NOCU3 | Nowellia curvifolia (Dicks.) Mitt. | | Cephaloziaceae
|
| NOWEL | Nowellia Mitt. | | Cephaloziaceae
|
| NURA | Nummularia radicans (Hook.) Kuntze | Lysimachia radicans | Primulaceae
|
| NUADF | Nuphar advena (Ait.) Ait. f. var. fraterna (Mill. & Standl.) Standl. | Nuphar lutea ssp. variegata | Nymphaeaceae
|
| NUADT | Nuphar advena (Ait.) Ait. f. var. tomentosa Torr. & Gray | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUAD2 | Nuphar advena (Ait.) Ait. f. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUFL2 | Nuphar fluviatilis (Harper) Standl. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUIN | Nuphar �interfluitans Fern. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NULUA | Nuphar lutea (L.) Sm. ssp. advena (Ait.) Kartesz & Gandhi | yellow pond-lily | Nymphaeaceae
|
| NULUM2 | Nuphar lutea (L.) Sm. ssp. macrophylla (Small) E.O. Beal | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NULUO | Nuphar lutea (L.) Sm. ssp. orbiculata (Small) E.O. Beal | yellow pond-lily | Nymphaeaceae
|
| NULUO2 | Nuphar lutea (L.) Sm. ssp. ozarkana (Mill. & Standl.) E.O. Beal | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NULUP | Nuphar lutea (L.) Sm. ssp. polysepala (Engelm.) E.O. Beal | Rocky Mountain pond-lily | Nymphaeaceae
|
| NULUP2 | Nuphar lutea (L.) Sm. ssp. pumila (Timm) E.O. Beal | yellow pond-lily | Nymphaeaceae
|
| NULUR | Nuphar lutea (L.) Sm. ssp. rubrodisca (Morong) Hellquist & Wiersema | yellow pond-lily | Nymphaeaceae
|
| NULUS | Nuphar lutea (L.) Sm. ssp. sagittifolia (Walt.) E.O. Beal | yellow pond-lily | Nymphaeaceae
|
| NULUU | Nuphar lutea (L.) Sm. ssp. ulvacea (Mill. & Standl.) E.O. Beal | yellow pond-lily | Nymphaeaceae
|
| NULUV | Nuphar lutea (L.) Sm. ssp. variegata (Dur.) E.O. Beal | varigated yellow pond-lily | Nymphaeaceae
|
| NULU | Nuphar lutea (L.) Sm. | yellow pond-lily | Nymphaeaceae
|
| NUMI3 | Nuphar microcarpa (Mill. & Standl.) Standl. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUMI4 | Nuphar microphylla (Pers.) Fern. | Nuphar lutea ssp. pumila | Nymphaeaceae
|
| NUOR | Nuphar orbiculata (Small) Standl. | Nuphar lutea ssp. orbiculata | Nymphaeaceae
|
| NUOV | Nuphar ovata (Mill. & Standl.) Standl. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUOZ | Nuphar ozarkana (Mill. & Standl.) Standl. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NUPO2 | Nuphar polysepala Engelm. | Nuphar lutea ssp. polysepala | Nymphaeaceae
|
| NUPU2 | Nuphar pumila (Timm) DC. | Nuphar lutea ssp. pumila | Nymphaeaceae
|
| NUPU | Nuphar puteora Fern. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NURU2 | Nuphar rubrodisca Morong | Nuphar lutea ssp. rubrodisca | Nymphaeaceae
|
| NUSA2 | Nuphar sagittifolia (Walt.) Pursh | Nuphar lutea ssp. sagittifolia | Nymphaeaceae
|
| NUVA2 | Nuphar variegata Dur. | Nuphar lutea ssp. variegata | Nymphaeaceae
|
| NUPHA | Nuphar Sm. | pond-lily | Nymphaeaceae
|
| NUCA | Nuttallanthus canadensis (L.) D.A. Sutton | Canada toadflax | Scrophulariaceae
|
| NUFL | Nuttallanthus floridanus (Chapman) D.A. Sutton | Apalachicola toadflax | Scrophulariaceae
|
| NUTE | Nuttallanthus texanus (Scheele) D.A. Sutton | Texas toadflax | Scrophulariaceae
|
| NUTTA | Nuttallanthus D.A. Sutton | toadflax | Scrophulariaceae
|
| NUAR | Nuttallia argillosa (J. Darl.) W.A. Weber | Mentzelia argillosa | Loasaceae
|
| NUCE | Nuttallia cerasiformis Torr. & Gray ex Hook. & Arn. | Oemleria cerasiformis | Rosaceae
|
| NUCH | Nuttallia chrysantha (Engelm. ex Brandeg.) Greene | Mentzelia chrysantha | Loasaceae
|
| NUCR | Nuttallia cronquistii (H.J. Thompson & Prigge) W.A. Weber | Mentzelia cronquistii | Loasaceae
|
| NUDE | Nuttallia decapetala (Pursh ex Sims) Greene | Mentzelia decapetala | Loasaceae
|
| NUDE2 | Nuttallia densa (Greene) Greene | Mentzelia densa | Loasaceae
|
| NUHU | Nuttallia humilis (Gray) Rydb. | Mentzelia humilis | Loasaceae
|
| NULA | Nuttallia laciniata (Rydb.) Woot. & Standl. | Mentzelia laciniata | Loasaceae
|
| NULA2 | Nuttallia laevicaulis (Dougl. ex Hook.) Greene | Mentzelia laevicaulis var. laevicaulis | Loasaceae
|
| NUMA | Nuttallia marginata Osterhout | Mentzelia marginata | Loasaceae
|
| NUMU | Nuttallia multicaulis Osterhout | Mentzelia multicaulis var. multicaulis | Loasaceae
|
| NUMU2 | Nuttallia multiflora (Nutt.) Greene | Mentzelia multiflora var. multiflora | Loasaceae
|
| NUNU | Nuttallia nuda (Pursh) Greene | Mentzelia nuda var. nuda | Loasaceae
|
| NUPT | Nuttallia pterosperma (Eastw.) Greene | Mentzelia pterosperma | Loasaceae
|
| NURE | Nuttallia reverchonii (Urban & Gilg) W.A. Weber | Mentzelia reverchonii | Loasaceae
|
| NURU | Nuttallia rusbyi (Woot.) Rydb. | Mentzelia rusbyi | Loasaceae
|
| NUSI | Nuttallia sinuata (Rydb.) Daniels | Mentzelia sinuata | Loasaceae
|
| NUSP | Nuttallia speciosa (Osterhout) Greene | Mentzelia speciosa | Loasaceae
|
| NUST | Nuttallia stricta (Osterhout) Greene | Mentzelia nuda var. stricta | Loasaceae
|
| NYPU | Nyachia pulvinata Small | Paronychia chartacea ssp. chartacea | Caryophyllaceae
|
| NYCA | Nyctaginia capitata Choisy | devil's bouquet | Nyctaginaceae
|
| NYCTA | Nyctaginia Choisy | nyctaginia | Nyctaginaceae
|
| NYNY2 | Nyctelea nyctelea (L.) Britt. | Ellisia nyctelea | Hydrophyllaceae
|
| NYGY | Nyholmiella gymnostoma (Bruch ex Brid.) Holm. & Warncke | Orthotrichum gymnostomum | Orthotrichaceae
|
| NYOB | Nyholmiella obtusifolia (Brid.) Holm. & Warncke | Orthotrichum obtusifolium | Orthotrichaceae
|
| NYAD | Nymphaea advena Ait. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NYAM | Nymphaea amazonum Mart. & Zucc. | Amazon waterlily | Nymphaeaceae
|
| NYAMA | Nymphaea ampla (Salisb.) DC. var. ampla | dotleaf waterlily | Nymphaeaceae
|
| NYAMP | Nymphaea ampla (Salisb.) DC. var. pulchella (DC.) Caspary | dotleaf waterlily | Nymphaeaceae
|
| NYAM2 | Nymphaea ampla (Salisb.) DC. | dotleaf waterlily | Nymphaeaceae
|
| NYBLF | Nymphaea blanda G.F.W. Mey. var. fenzliana (Lehm.) Caspary | Nymphaea glandulifera | Nymphaeaceae
|
| NYBL | Nymphaea blanda G.F.W. Meyer | waterlily | Nymphaeaceae
|
| NYBO | Nymphaea bombycina (Mill. & Standl.) Standl. | Nuphar lutea ssp. orbiculata | Nymphaeaceae
|
| NYCA3 | Nymphaea caerulea Savigny | Egyptian lotus | Nymphaeaceae
|
| NYCAZ | Nymphaea capensis Thunb. var. zanzibariensis (Caspary) Conard | Cape Blue waterlily | Nymphaeaceae
|
| NYCA2 | Nymphaea capensis Thunb. | Cape Blue waterlily | Nymphaeaceae
|
| NYCH | Nymphaea chartacea Mill. & Standl. | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NYCO2 | Nymphaea conardii Wiersema | roundleaf waterlily | Nymphaeaceae
|
| NYDA | Nymphaea �daubenyana W.T. Baxter ex Daubeny | | Nymphaeaceae
|
| NYEL | Nymphaea elegans Hook. | tropical royalblue waterlily | Nymphaeaceae
|
| NYFL | Nymphaea fluviatilis Harper | Nuphar lutea ssp. advena | Nymphaeaceae
|
| NYFR | Nymphaea fraterna Mill. & Standl. | Nuphar lutea ssp. variegata | Nymphaeaceae
|
| NYGL | Nymphaea glandulifera Rodschied | sleepingbeauty waterlily | Nymphaeaceae
|
| NYJA | Nymphaea jamesoniana Planch. | James' waterlily | Nymphaeaceae
|
| NYLE | Nymphaea leibergii Morong | Leiberg's waterlily | Nymphaeaceae
|
| NYLO | Nymphaea lotus L. | white Egyptian lotus | Nymphaeaceae
|
| NYMA | Nymphaea macrophylla Small | Nuphar lutea ssp. advena | Nymphaeaceae
|