Contains 5 accepted taxa overall.

Characteristics
Najas L.
WATERNYMPH
Classification
ALISMATALES
Najas
Citation
NAJAS Linnaeus, Sp. Pl. 1015. 1753.
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TYPE: Najas marina Linnaeus
Distribution Map Present

This species have been reported in the counties highlighted.

Species
Scientific Name Common Name Herbarium Specimens Status Photos
Najas filifolia NEEDLELEAF WATERNYMPH; SLENDER NAIAD Native Threatened-State OBL (NWPL)
Najas guadalupensis SOUTHERN WATERNYMPH Native OBL (NWPL)
Najas marina SPINY WATERNYMPH Native OBL (NWPL)
Najas minor BRITTLE WATERNYMPH Not Native OBL (NWPL)
Najas wrightiana WRIGHT'S WATERNYMPH Native OBL (NWPL)
Identification Key
1.  Internodes usually with prickles; leaf midrib with prickles; testa pitted, 10-15 cell layers thick
1.  Internodes and leaf midrib without prickles; testa smooth or pitted, 3 cell layers thick
2
2.  Leaf margins minutely serrulate, usually >15 teeth per side, the teeth unicellular
2.  Leaf margins conspicuously serrulate, usually <16 teeth per side, the teeth multicellular
3
3.  Leaves spreading to ascending with age; seeds not recurved
3.  Leaves usually becoming recurved with age; seeds recurved
4
4.  Leaves becoming laxly stiff, with 5-9 teeth per side; seeds strongly recurved, greenish brown, the areoles regularly arranged in ca. 20 longitudinal rows, not ladderlike, 4-angled, longer than broad, end walls raised
4.  Leaves stiff, with 7-15 teeth per side; seeds slightly recurved, purplish, testa dull, 3 cell layers thick, pitted, the areoles regularly arranged in ca. 15 longitudinal rows, ladderlike, 4-angled, broader than long, end walls not raised
Genus Synonyms
Synonym Full Citation Basionym Type
Aglae Aglae Dulac, Fl. Hautes-Pyrénées 43 (as 'Aegle'), 531. 1867. TYPE: = Caulinia Willdenow 1801.
Caulinia Caulinia Willdenow, Mem. Acad. Roy. Sci. Hist. (Berlin) 1798: 87. 1801. TYPE: Caulinia fragilis Willdenow, nom. illegit. (Najas minor Allioni; Caulinia minor (Allioni) Cosson & Germain de Saint-Pierre)
Fluvialis Fluvialis Persoon, Syn. Pl. 2: 530. 1806, non Seguier 1754. TYPE: = Caulinia Willdenow 1801.
Fluvialis Fluvialis Seguier, Pl. Veron. 3: 99. 1754. TYPE: = Najas Linnaeus 1753.
Ittnera Ittnera C. C. Gmelin, Fl. Bad. 3: 590. 1808. TYPE: = Najas Linnaeus 1753.