Wright's Waternymph

Stems profusely branched proximally to distally, 9--45 cm ´ 0.3--1 mm; internodes 0.3--5.2 cm, without prickes abaxially. Leaves ascending with age, 0.5--2.6 cm, stiff in age; sheath 0.7--2.8 mm wide, apex rounded; blade 0.2--1.3 mm wide, margins conspicuously serrulate, teeth 8--22 per side, apex acute, with 1 tooth, teeth multicellular; midvein without prickles abaxially. Flowers 1--2 per axil, staminate and pistillate on same plant. Staminate flowers in distal axils, 1.2--1.9 mm; involucral beaks 2-lobed, 0.3--0.5 mm; anther 4-loculed,1 mm. Pistillate flowers in proximal axils, 2 mm; styles to 0.7 mm; stigmas 4-lobed. Seeds not recurved, whitish, fusiform, 0.7--1.5 ´ 0.3--0.5 mm, apex with style situated at center; testa dull, 3 cell layers thick, pitted; aeroleareoles regularly arranged in 20 longitudinal rows, not ladderlike, 4--5-angled, longer than broad, end walls raised. Chromosome number unknown not available.

introduced; Fla.; Mexico; Central America (Guatemala, Belize, Honduras); West Indies (Cuba).

Flowering late spring--fall.

Slow moving streams and ponds; 0--100m.

Najas wrightiana is a species of aquatic plant in the Hydrocharitaceae family. It is referred to by the common name Wright's waternymph, and is found in lakes and streams. It is native to Mexico, Guatemala, Belize, Honduras, the Bahamas, Cuba, and Venezuela. It is also considered introduced and naturalized in southern Florida.