Equisetum laevigatum

A. Braun

Amer. J. Sci. Arts 46: 87. 1844.

Common names: Smooth scouring rush
Basionym: Equisetum funstonii A.A. Eaton E. kansanum J.H. Schaffner
Treatment appears in FNA Volume 2.

Aerial stems lasting less than a year, occasionally overwintering in the southwestern United States, usually unbranched, 20–150 cm; lines of stomates single; ridges 10–32. Sheaths green, elongate, 7–15 × 3–9 mm; teeth 10–32, articulate and usually shed early, leaving dark rim on sheath. Cone apex rounded to apiculate with blunt tip; spores green, spheric. 2n =216.

Phenology: Cones maturing in spring–early summer.
Habitat: Moist prairies, riverbanks, roadsides
Elevation: 1530–3500 m


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Alta., B.C., Man., Ont., Que., Sask., Ariz., Ark., Calif., Colo., Idaho, Ill., Ind., Iowa, Kans., Mich., Minn., Mo., Mont., Nebr., Nev., N.Mex., N.Dak., Ohio, Okla., Oreg., S.Dak., Tex., Utah, Wash., Wis., Wyo., n Mexico including Baja California.


Schaffner named this species Equisetum kansanum because he applied the name E. laevigatum to what we now know is the hybrid E. × ferrissii. The coarser-stemmed, occasionally persistent forms in the southwestern United States have been called Equisetum funstonii.

Selected References


Lower Taxa

... more about "Equisetum laevigatum"
Richard L. Hauke +
A. Braun +
Equisetum funstonii +
Smooth scouring rush +
Alta. +, B.C. +, Man. +, Ont. +, Que. +, Sask. +, Ariz. +, Ark. +, Calif. +, Colo. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wis. +, Wyo. +  and n Mexico including Baja California. +
1530–3500 m +
Moist prairies, riverbanks, roadsides +
Cones maturing in spring–early summer. +
Amer. J. Sci. Arts +
Equisetum laevigatum +
Equisetum subg. Equisetum +
species +