| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| NABO | Nabalus boottii DC. | Prenanthes boottii | Asteraceae
|
| NACR | Nabalus crepidineus (Michx.) DC. | Prenanthes crepidinea | Asteraceae
|
| NACY | Nabalus cylindricus Small | Prenanthes roanensis | Asteraceae
|
| NAIN4 | Nabalus integrifolius Cass. | Prenanthes serpentaria | Asteraceae
|
| NANA | Nabalus nanus (Bigelow) DC. | Prenanthes nana | Asteraceae
|
| NARA2 | Nabalus racemosus (Michx.) DC. | Prenanthes racemosa ssp. racemosa | Asteraceae
|
| NARO3 | Nabalus roanensis Chickering | Prenanthes roanensis | Asteraceae
|
| NASE3 | Nabalus serpentarius (Pursh) Hook. | Prenanthes serpentaria | Asteraceae
|
| NATR | Nabalus trifoliolatus Cass. | Prenanthes trifoliolata | Asteraceae
|
| NAVI3 | Nabalus virgatus (Michx.) DC. | Prenanthes autumnalis | Asteraceae
|
| NAHA3 | Nadvornikia hawaiensis (Tuck.) Tibell | | Thelotremataceae
|
| NASO | Nadvornikia sorediata R. C. Harris | | Thelotremataceae
|
| NADVO | Nadvornikia Tibell | nadvornikia | Thelotremataceae
|
| NACO3 | Nageia coriacea (L.C. Rich.) Kuntze | Podocarpus coriaceus | Podocarpaceae
|
| NAAN | Najas ancistrocarpa auct. non Magnus | Najas filifolia | Najadaceae
|
| NAARC | Najas arguta Kunth var. conferta A. Braun | Najas wrightiana | Najadaceae
|
| NACA4 | Najas caespitosa (Maguire) Reveal | Najas flexilis | Najadaceae
|
| NACO2 | Najas conferta (A. Braun) A. Braun | Najas wrightiana | Najadaceae
|
| NAFI2 | Najas filifolia Haynes | needleleaf waternymph | Najadaceae
|
| NAFLC | Najas flexilis (Willd.) Rostk. & Schmidt ssp. caespitosa Maguire | Najas flexilis | Najadaceae
|
| NAFLC2 | Najas flexilis (Willd.) Rostk. & Schmidt var. congesta Farw. | Najas flexilis | Najadaceae
|
| NAFLR | Najas flexilis (Willd.) Rostk. & Schmidt var. robusta Morong | Najas flexilis | Najadaceae
|
| NAFL | Najas flexilis (Willd.) Rostk. & Schmidt | nodding waternymph | Najadaceae
|
| NAGR3 | Najas gracilis (Morong) Small | Najas marina | Najadaceae
|
| NAGR | Najas gracillima (A. Braun ex Engelm.) Magnus | slender waternymph | Najadaceae
|
| NAGR2 | Najas graminea Delile | ricefield waternymph | Najadaceae
|
| NAGUF2 | Najas guadalupensis (Spreng.) Magnus ssp. floridana (Haynes & Wentz) Haynes & C.B. Hellquist | Florida waternymph | Najadaceae
|
| NAGUG | Najas guadalupensis (Spreng.) Magnus ssp. guadalupensis | southern waternymph | Najadaceae
|
| NAGUM2 | Najas guadalupensis (Spreng.) Magnus ssp. muenscheri (Clausen) Haynes & C.B. Hellquist | Muenscher's waternymph | Najadaceae
|
| NAGUO2 | Najas guadalupensis (Spreng.) Magnus ssp. olivacea (Rosendahl & Butters) Haynes & C.B. Hellquist | Guadalupe waternymph | Najadaceae
|
| NAGUF | Najas guadalupensis (Spreng.) Magnus var. floridana Haynes & Wentz | Najas guadalupensis ssp. floridana | Najadaceae
|
| NAGUM | Najas guadalupensis (Spreng.) Magnus var. muenscheri (Clausen) Haynes | Najas guadalupensis ssp. muenscheri | Najadaceae
|
| NAGUO | Najas guadalupensis (Spreng.) Magnus var. olivacea (Rosendahl & Butters) Haynes | Najas guadalupensis ssp. olivacea | Najadaceae
|
| NAGU | Najas guadalupensis (Spreng.) Magnus | southern waternymph | Najadaceae
|
| NAING | Najas indica (Willd.) Cham. var. gracillima A. Braun ex Engelm. | Najas gracillima | Najadaceae
|
| NAMAA | Najas major All. var. angustifolia A. Braun ex K. Schum. | Najas marina | Najadaceae
|
| NAMA3 | Najas major All. | Najas marina | Najadaceae
|
| NAMAR | Najas marina L. var. recurvata Dudley | Najas marina | Najadaceae
|
| NAMA | Najas marina L. | spiny naiad | Najadaceae
|
| NAMI | Najas minor All. | brittle waternymph | Najadaceae
|
| NAMU2 | Najas muenscheri Clausen | Najas guadalupensis ssp. muenscheri | Najadaceae
|
| NAOL | Najas olivacea Rosendahl & Butters | Najas guadalupensis ssp. olivacea | Najadaceae
|
| NAWRM | Najas wrightiana A. Braun ssp. multidentata (Koch) Clausen | Najas wrightiana | Najadaceae
|
| NAWR | Najas wrightiana A. Braun | Wright's waternymph | Najadaceae
|
| NAJAS | Najas L. | waternymph | Najadaceae
|
| NAAF | Nama affinis (Gray) Kuntze | Hydrolea uniflora | Hydrophyllaceae
|
| NAARA | Nama aretioides (Hook. & Arn.) Brand var. aretioides | ground nama | Hydrophyllaceae
|
| NAARC2 | Nama aretioides (Hook. & Arn.) Brand var. californicum (Brand) Jepson | ground nama | Hydrophyllaceae
|
| NAARM | Nama aretioides (Hook. & Arn.) Brand var. multiflorum (Heller) Jepson | ground nama | Hydrophyllaceae
|
| NAAR | Nama aretioides (Hook. & Arn.) Brand | ground nama | Hydrophyllaceae
|
| NAAR2 | Nama arizonicum Bacon | Arizona fiddleleaf | Hydrophyllaceae
|
| NACA3 | Nama californicum (Gray) Bacon | California fiddleleaf | Hydrophyllaceae
|
| NACA | Nama carnosum (Woot.) C.L. Hitchc. | sand fiddleleaf | Hydrophyllaceae
|
| NACO4 | Nama corymbosa (J.F. Macbr. ex Ell.) Kuntze | Hydrolea corymbosa | Hydrophyllaceae
|
| NADEC | Nama demissum Gray var. covillei Brand | Coville's purplemat | Hydrophyllaceae
|
| NADED | Nama demissum Gray var. demissum | purplemat | Hydrophyllaceae
|
| NADED3 | Nama demissum Gray var. deserti Brand | Nama demissum var. demissum | Hydrophyllaceae
|
| NADE | Nama demissum Gray | purplemat | Hydrophyllaceae
|
| NADED2 | Nama densum J.G. Lemmon var. densum | leafy fiddleleaf | Hydrophyllaceae
|
| NADEP | Nama densum J.G. Lemmon var. parviflorum (Greenm.) C.L. Hitchc. | leafy fiddleleaf | Hydrophyllaceae
|
| NADE2 | Nama densum J.G. Lemmon | leafy nama | Hydrophyllaceae
|
| NADE3 | Nama depressum J.G. & S.A. Lemmon ex Gray | depressed fiddleleaf | Hydrophyllaceae
|
| NADI | Nama dichotomum (Ruiz & Pav�n) Choisy | wishbone fiddleleaf | Hydrophyllaceae
|
| NAFO2 | Nama foliosum (Woot. & Standl.) Tidestrom | Nama hispidum | Hydrophyllaceae
|
| NAHA | Nama havardii Gray | Havard's fiddleleaf | Hydrophyllaceae
|
| NAHIM | Nama hispidum Gray var. mentzelii Brand | Nama hispidum | Hydrophyllaceae
|
| NAHIR | Nama hispidum Gray var. revolutum Jepson | Nama hispidum | Hydrophyllaceae
|
| NAHIS2 | Nama hispidum Gray var. spathulatum (Torr.) C.L. Hitchc. | Nama hispidum | Hydrophyllaceae
|
| NAHI | Nama hispidum Gray | bristly nama | Hydrophyllaceae
|
| NAJA | Nama jamaicense L. | Jamaicanweed | Hydrophyllaceae
|
| NALO | Nama lobbii Gray | Lobb's fiddleleaf | Hydrophyllaceae
|
| NAOV | Nama ovata (Nutt. ex Choisy) Britt. | Hydrolea ovata | Hydrophyllaceae
|
| NAPA | Nama parvifolium (Torr.) Greenm. | small-leaf fiddleleaf | Hydrophyllaceae
|
| NAPU | Nama pusillum J.G. & S.A. Lemmon ex Gray | eggleaf fiddleleaf | Hydrophyllaceae
|
| NAQU | Nama quadrivalvis (Walt.) Kuntze | Hydrolea quadrivalvis | Hydrophyllaceae
|
| NARE | Nama retrorsum J.T. Howell | betatakin fiddleleaf | Hydrophyllaceae
|
| NARO | Nama rothrockii Gray | Rothrock's fiddleleaf | Hydrophyllaceae
|
| NASAL | Nama sandwicense Gray var. laysanicum Brand | Nama sandwicense | Hydrophyllaceae
|
| NASA | Nama sandwicense Gray | hinahina kahakai | Hydrophyllaceae
|
| NAST | Nama stenocarpum Gray | mud fiddleleaf | Hydrophyllaceae
|
| NASTE | Nama stenophyllum Gray ex Hemsl. var. egenum J.F. Macbr. | Nama carnosum | Hydrophyllaceae
|
| NAST2 | Nama stevensii C.L. Hitchc. | Stevens' fiddleleaf | Hydrophyllaceae
|
| NATE | Nama tenue (Woot. & Standl.) Tidestrom | Nama hispidum | Hydrophyllaceae
|
| NATO | Nama torynophyllum Greenm. | matted fiddleleaf | Hydrophyllaceae
|
| NAUN | Nama undulatum Kunth | whitewhisker fiddleleaf | Hydrophyllaceae
|
| NAXY | Nama xylopodum (Woot. & Standl.) C.L. Hitchc. | yellowseed fiddleleaf | Hydrophyllaceae
|
| NAMA4 | Nama L. | fiddleleaf | Hydrophyllaceae
|
| NADO | Nandina domestica Thunb. | sacred bamboo | Berberidaceae
|
| NANDI | Nandina Thunb. | nandina | Berberidaceae
|
| NAAUF | Nanomitrium austinii (Sull. in Aust.) Lindb. var. floridanum Grout | Micromitrium austinii | Ephemeraceae
|
| NAAU2 | Nanomitrium austinii (Sull. in Aust.) Lindb. | Micromitrium austinii | Ephemeraceae
|
| NAME3 | Nanomitrium megalosporum (Aust.) Britt. | Micromitrium megalosporum | Ephemeraceae
|
| NASY | Nanomitrium synoicum (James) Lindb. | Micromitrium synoicum | Ephemeraceae
|
| NATE2 | Nanomitrium tenerum (Bruch & Schimp. in B.S.G.) Lindb. | Micromitrium tenerum | Ephemeraceae
|
| NAWR2 | Nanomitrium wrightii (C. M�ll.) Anderson & Bryan | Micromitrium wrightii | Ephemeraceae
|
| NAPS2 | Nanostictis pseudocyphellariae Sherwood | | Stictidaceae
|
| NANOS | Nanostictis M. S. Christ. | nanostictis | Stictidaceae
|
| NADI2 | Napaea dioica L. | glademallow | Malvaceae
|
| NAHE3 | Napaea hermaphrodita L. | Sida hermaphrodita | Malvaceae
|
| NAPAE | Napaea L. | napaea | Malvaceae
|
| NAAS2 | Narcissus assoanus Dufour | rushleaf jonquil | Liliaceae
|