Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt image
Photographer: Robert W. Freckmann           

Botanical Illustration

Paul Skawinski

Paul Skawinski
Family Najadaceae
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt
nodding water-nymph, northern water-nymph, slender naiad
Najas: from Greek Naias, a water nymph
flexilis: flexible, pliant, limber
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: submerged annual, to 40" tall, monoecious aquatic, can be slender and trailing or dense and bushy; stems very long, many branches; slight rootstock
Flower: tiny, from leaf axis
Fruit:glossy, paper-thin walls, 30-50 rows of small pits
Leaf:pale green, very narrow, to 2"L x 0.5"W, toothed edges, opposite, clasping stem, wide-sloped at base;
Habitat: wet; clear 3' or more deep water; in sandy, gravelly soil
Notes: occasionally leaves bunch together at leaf axils, very variable

More Information Natural Communities Herbarium Specimens
All Najas list Google- Images or Text

Flora of North America (off site)
Caulinia flexilis Willd.
Fluvialis flexilis (Willd.) Pers.
Najas caespitosus (Maguire) Reveal
Najas canadensis Michx.
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt subsp. caespitosus Maguire
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt var. congesta Farw.
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt var. robusta Morong

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