Elodea nuttallii

(Planchon) H. St. John

Rhodora 22:29. 1920.

Illustrated
Basionym: Anacharis nuttallii Planchon Ann. Mag. Nat. Hist., ser. 2, 1: 86. 1848
Treatment appears in FNA Volume 22.

Leaves mostly in 3s, often recurved, linear to lanceolate, 4–15.5 × 0.9–1.7(–2.4) mm, margins folded. Inflorescences: staminate spathes subglobose to ovoid, 2.2–4 mm; peduncles abscissing in bud; pistillate spathes linear, 8.5–15 mm. Flowers unisexual; staminate flowers: stamens 9, pedicels briefly remaining attached following anthesis; inner 3 filaments connate proximally, forming column; anthers 1–1.4 mm; pollen in tetrads; pistillate flowers: styles mostly 1.2–2 mm. Seeds fusiform, 4–4.6 mm, base with long hairs. 2n = 48 (Britain).


Phenology: Flowering summer.
Habitat: Waters, mostly calcareous, of lakes and rivers
Elevation: 50–1600 m

Distribution

V22 537-distribution-map.jpg

N.B., Ont., Que., Ark., Calif., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mont., Mo., Nebr., Nev., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Tenn., Vt., Va., Wash., W.Va., Wis., Wyo., Europe, Asia.

Discussion

I know of no instance in North America where Elodea nuttalli or E. canadensis is weedy. Both are weedy in Europe, and E. canadensis is weedy also in Australia and New Zealand.

Selected References

None.

Lower Taxa

None.
... more about "Elodea nuttallii"
Robert R. Haynes +
(Planchon) H. St. John +
Anacharis nuttallii +
N.B. +, Ont. +, Que. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, Mo. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +  and Asia. +
50–1600 m +
Waters, mostly calcareous, of lakes and rivers +
Flowering summer. +
Illustrated +
Elodea nuttallii +
species +