Home Flora of Missouri
Name Search
Najas flexilis (Willd.) Rostk. & W.L.E. Schmidt Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Flora Sedinensis 382. 1824. (Fl. Sedin.) Name publication detail

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


Export To PDF Export To Word

1. Najas flexilis (Willd.) Rostk. & F.W. Schmidt (northern naiad)

Pl. 110 g, h; Map 450

Stems 20–50 cm long. Leaves 1–3 cm long, 0.2–0.6 mm wide, ascending to spreading, minutely serrulate with 1‑celled teeth usually visible only with magnification, the tip acute to acuminate. Leaf bases gradually broadened into stipular sheaths, the sheaths not auriculate. Seeds 2.5–3.7 mm long, elliptic to narrowly obovate, not curved at the tip, the surface yellow to reddish brown, shiny, finely and indistinctly pitted with 30–50 rows of 4–6‑sided pits. 2n=12, 24. July–September.

Uncommon, known only from historical collections from Boone County (U.S. and Canada, south to Utah and Maryland). Submerged aquatic in lakes.

This species is apparently sensitive to changes in water quality (Wentz and Stuckey, 1971) and has disappeared from a number of sites within its range, including the Missouri populations, as waters have become polluted.



© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110