| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| NABI | Narcissus biflorus W. Curtis | Narcissus medioluteus | Liliaceae
|
| NABU | Narcissus bulbocodium L. | petticoat daffodil | Liliaceae
|
| NAIN | Narcissus �incomparabilis P. Mill. (pro sp.) | nonesuch daffodil | Liliaceae
|
| NAJO | Narcissus jonquilla L. | jonquil | Liliaceae
|
| NAJU | Narcissus juncifolius auct. non Lag. | Narcissus assoanus | Liliaceae
|
| NAME2 | Narcissus �medioluteus P. Mill. (pro sp.) | primrose peerless | Liliaceae
|
| NAOD | Narcissus �odorus L. (pro sp.) | Campernelle jonquil | Liliaceae
|
| NAPA3 | Narcissus papyraceus Ker-Gawl. | paperwhite narcissus | Liliaceae
|
| NAPO3 | Narcissus poetaz hort. ex Bailey | Narcissus medioluteus | Liliaceae
|
| NAPO | Narcissus poeticus L. | poet's narcissus | Liliaceae
|
| NAPS | Narcissus pseudonarcissus L. | daffodil | Liliaceae
|
| NATA2 | Narcissus tazetta L. | cream narcissus | Liliaceae
|
| NARCI | Narcissus L. | daffodil | Liliaceae
|
| NABR4 | Nardia breidleri (Limpr.) Lindb. | | Jungermanniaceae
|
| NACO5 | Nardia compressa (Hook.) Gray | | Jungermanniaceae
|
| NAGEB | Nardia geoscyphus (De Not.) Lindb. var. bifida R. M. Schust. | | Jungermanniaceae
|
| NAGEG | Nardia geoscyphus (De Not.) Lindb. var. geoscyphus | | Jungermanniaceae
|
| NAGE | Nardia geoscyphus (De Not.) Lindb. | | Jungermanniaceae
|
| NAIN5 | Nardia insecta Lindb. | | Jungermanniaceae
|
| NAJA4 | Nardia japonica Steph. | | Jungermanniaceae
|
| NALE4 | Nardia lescurii (Austin) Underw. | | Jungermanniaceae
|
| NASCB | Nardia scalaris Gray ssp. botryoidea R. M. Schust. | | Jungermanniaceae
|
| NASCS | Nardia scalaris Gray ssp. scalaris | | Jungermanniaceae
|
| NASC2 | Nardia scalaris Gray | | Jungermanniaceae
|
| NARDI | Nardia Gray nom. cons. | | Jungermanniaceae
|
| NAAR3 | Nardosmia arctica (Porsild) A.& D. L�ve | Petasites frigidus var. palmatus | Asteraceae
|
| NAJA3 | Nardosmia japonica Sieb. & Zucc. | Petasites japonicus | Asteraceae
|
| NAVI2 | Nardosmia vitifolia (Greene) A.& D. L�ve | Petasites vitifolius | Asteraceae
|
| NACI | Nardus ciliaris L. | Eremochloa ciliaris | Poaceae
|
| NAST3 | Nardus stricta L. | matgrass | Poaceae
|
| NARDU | Nardus L. | matgrass | Poaceae
|
| NAAM | Narthecium americanum Ker-Gawl. | yellow asphodel | Liliaceae
|
| NACA2 | Narthecium californicum Baker | California bog asphodel | Liliaceae
|
| NAGL | Narthecium glutinosum Michx. | Tofieldia glutinosa ssp. glutinosa | Liliaceae
|
| NAOSA | Narthecium ossifragum (L.) Huds. var. americanum (Ker-Gawl.) Gray | Narthecium americanum | Liliaceae
|
| NAPU3 | Narthecium pusillum Michx. | Tofieldia pusilla | Liliaceae
|
| NARTH | Narthecium Huds. | asphodel | Liliaceae
|
| NAIN3 | Nashia inaguensis Millsp. | | Verbenaceae
|
| NASHI | Nashia Millsp. | nashia | Verbenaceae
|
| NABR2 | Nassella brachychaeta (Godr.) Barkworth | Achnatherum brachychaetum | Poaceae
|
| NACE | Nassella cernua (Stebbins & R.M. Love) Barkworth | nodding tussockgrass | Poaceae
|
| NACH | Nassella chilensis (Trin.) E. Desv. | Chilean tussockgrass | Poaceae
|
| NAFO3 | Nassella formicarum (Delile) Barkworth | tropical tussockgrass | Poaceae
|
| NALE2 | Nassella lepida (A.S. Hitchc.) Barkworth | smallflower tussockgrass | Poaceae
|
| NALE3 | Nassella leucotricha (Trin. & Rupr.) Pohl | Texas tussockgrass | Poaceae
|
| NANE | Nassella neesiana (Trin. & Rupr.) Barkworth | Uruguayan tussockgrass | Poaceae
|
| NAPU4 | Nassella pulchra (A.S. Hitchc.) Barkworth | purple tussockgrass | Poaceae
|
| NATE3 | Nassella tenuissima (Trin.) Barkworth | finestem tussockgrass | Poaceae
|
| NATR3 | Nassella trichotoma Hackel ex Arech. | serrated tussock grass | Poaceae
|
| NAVI4 | Nassella viridula (Trin.) Barkworth | green needlegrass | Poaceae
|
| NASSE | Nassella (Trin.) Desv. | tussockgrass | Poaceae
|
| NAAM2 | Nasturtium amphibium (L.) Ait. f. | Rorippa amphibia | Brassicaceae
|
| NAAR4 | Nasturtium armoracia (L.) Fries | Armoracia rusticana | Brassicaceae
|
| NAAU | Nasturtium austriacum Crantz | Rorippa austriaca | Brassicaceae
|
| NACA5 | Nasturtium calycinum Engelm. | Rorippa calycina | Brassicaceae
|
| NACUN | Nasturtium curvisiliqua (Hook.) Nutt. ex Torr. & Gray var. nuttallii S. Wats. | Rorippa curvisiliqua var. nuttallii | Brassicaceae
|
| NACU | Nasturtium curvisiliqua (Hook.) Nutt. ex Torr. & Gray | Rorippa curvisiliqua var. curvisiliqua | Brassicaceae
|
| NAGA | Nasturtium gambelii (S. Wats.) O.E. Schulz | Rorippa gambelii | Brassicaceae
|
| NAHE4 | Nasturtium heterophyllum Blume | Rorippa indica var. indica | Brassicaceae
|
| NALA | Nasturtium lacustre Gray | Neobeckia aquatica | Brassicaceae
|
| NALY | Nasturtium lyratum Nutt. | Rorippa curvisiliqua var. lyrata | Brassicaceae
|
| NAMI2 | Nasturtium microphyllum Boenn. ex Reichenb. | Rorippa microphylla | Brassicaceae
|
| NAMI6 | Nasturtium microspermum DC. | Rorippa cantoniensis | Brassicaceae
|
| NANA2 | Nasturtium nasturtium-aquaticum (L.) Karsten | Rorippa nasturtium-aquaticum | Brassicaceae
|
| NAOBA | Nasturtium obtusum Nutt. var. alpinum S. Wats. | Rorippa alpina | Brassicaceae
|
| NAOC | Nasturtium occidentale Greene | Rorippa curvisiliqua var. occidentalis | Brassicaceae
|
| NAOFM | Nasturtium officinale Ait. f. var. microphyllum (Boenn. ex Reichenb.) Thellung | Rorippa microphylla | Brassicaceae
|
| NAOFS | Nasturtium officinale Ait. f. var. siifolium (Reichenb.) W.D.J. Koch | Rorippa nasturtium-aquaticum | Brassicaceae
|
| NAOF | Nasturtium officinale Ait. f. | Rorippa nasturtium-aquaticum | Brassicaceae
|
| NASA2 | Nasturtium sarmentosum (G. Forst. ex DC.) Schinz & Guillaumin | Rorippa sarmentosa | Brassicaceae
|
| NASE4 | Nasturtium sessiliflorum Nutt. | Rorippa sessiliflora | Brassicaceae
|
| NASIC | Nasturtium sinuatum Nutt. var. columbiae Suksdorf ex B.L. Robins. | Rorippa columbiae | Brassicaceae
|
| NASI | Nasturtium sinuatum Nutt. | Rorippa sinuata | Brassicaceae
|
| NASP | Nasturtium sphaerocarpum Gray | Rorippa sphaerocarpa | Brassicaceae
|
| NAST4 | Nasturtium �sterile (Airy-Shaw) Oefel. | Rorippa sterilis | Brassicaceae
|
| NAST6 | Nasturtium stylosum Shuttlw. ex O.E. Schulz | Rorippa floridana | Brassicaceae
|
| NATH | Naumburgia thyrsiflora (L.) Duby | Lysimachia thyrsiflora | Primulaceae
|
| NAAB | Navarretia abramsii Elmer | Eriastrum abramsii | Polemoniaceae
|
| NAAT | Navarretia atractyloides (Benth.) Hook. & Arn. | hollyleaf pincushionplant | Polemoniaceae
|
| NABA | Navarretia bakeri Mason | Navarretia leucocephala ssp. bakeri | Polemoniaceae
|
| NABR | Navarretia breweri (Gray) Greene | Brewer's navarretia | Polemoniaceae
|
| NACO | Navarretia cotulifolia (Benth.) Hook. & Arn. | cotulaleaf pincushionplant | Polemoniaceae
|
| NADID | Navarretia divaricata (Torr. ex Gray) Greene ssp. divaricata | divaricate navarretia | Polemoniaceae
|
| NADIV | Navarretia divaricata (Torr. ex Gray) Greene ssp. vividior (Jepson & V. Bailey) Mason | divaricate navarretia | Polemoniaceae
|
| NADI3 | Navarretia divaricata (Torr. ex Gray) Greene | divaricate navarretia | Polemoniaceae
|
| NAER | Navarretia eriocephala Mason | hoary pincushionplant | Polemoniaceae
|
| NAFI | Navarretia filicaulis (Torr. ex Gray) Greene | threadstem pincushionplant | Polemoniaceae
|
| NAFO | Navarretia fossalis Moran | vernalpool pincushionplant | Polemoniaceae
|
| NAHAF | Navarretia hamata Greene ssp. foliacea (Greene) Mason | Navarretia atractyloides | Polemoniaceae
|
| NAHAH | Navarretia hamata Greene ssp. hamata | hooked pincushionplant | Polemoniaceae
|
| NAHAL | Navarretia hamata Greene ssp. leptantha (Greene) Mason | hooked pincushionplant | Polemoniaceae
|
| NAHAP | Navarretia hamata Greene ssp. parviloba Day | small-lobe navarretia | Polemoniaceae
|
| NAHAF2 | Navarretia hamata Greene var. foliacea (Greene) Thorne | Navarretia atractyloides | Polemoniaceae
|
| NAHA2 | Navarretia hamata Greene | hooked pincushionplant | Polemoniaceae
|
| NAHE | Navarretia heterandra Mason | Tehama pincushionplant | Polemoniaceae
|
| NAHER | Navarretia heterodoxa (Greene) Greene ssp. rosulata (Brand) Mason | Navarretia rosulata | Polemoniaceae
|
| NAHE2 | Navarretia heterodoxa (Greene) Greene | Calistoga pincushionplant | Polemoniaceae
|
| NAHI2 | Navarretia hirsutissima Brand | Navarretia hamata ssp. parviloba | Polemoniaceae
|
| NAINI | Navarretia intertexta (Benth.) Hook. ssp. intertexta | needleleaf navarretia | Polemoniaceae
|
| NAINP3 | Navarretia intertexta (Benth.) Hook. ssp. propinqua (Suksdorf) Day | near navarretia | Polemoniaceae
|
| NAINP2 | Navarretia intertexta (Benth.) Hook. var. propinqua (Suksdorf) Brand | Navarretia intertexta ssp. propinqua | Polemoniaceae
|