Fragaria vesca subsp. americana

(Porter) Staudt

Canad. J. Bot. 40: 872. 1962.

Common names: Fraisier américain
EndemicIllustrated
Basionym: Fragaria vesca var. americana Porter Bull. Torrey Bot. Club 17: 15. 1890
Synonyms: F. americana
Treatment appears in FNA Volume 9. Treatment on page 276. Mentioned on page 275.

Leaves green to bright green; terminal leaflet blade ovate or obovate to slightly rhombic, length/width 1.3–1.6, teeth: relative number 0.2–0.6, relative size 1.5–4, terminal tooth longer than adjacent teeth. Flowers bisexual, 12–14.6 mm diam.; hypanthium 11–16.5 mm diam.; petals white, obovate to widely obovate, margins distinct, sometimes distally crenate. Achenes superficial; bractlets and sepals spreading to strongly reflexed; torus carmine, shiny, elongate-conic (often somewhat pointed), easily separating from hypanthium. 2n = 14.


Phenology: Flowering spring.
Habitat: Open forests, forest edges, clearings, along trails and roadsides, open grasslands, often on steep, rocky slopes and outcrops
Elevation: 0–1900 m

Distribution

V9 441-distribution-map.jpg

Alta., B.C., Man., N.B., N.W.T., N.S., Ont., Que., Sask., Conn., Ill., Iowa, Maine, Mass., Mich., Minn., Miss., Nebr., N.H., N.Y., N.C., N.Dak., Ohio, Pa., S.Dak., Vt., Va., W.Va., Wis.

Discussion

It is assumed that after the maximum glaciation, this North American subspecies spread from an eastern refugium northeastward to the Gaspé and northwestward to the Mackenzie and Peace rivers (G. Staudt 1999).

Selected References

None.

Lower Taxa

None.
Günter Staudt† +
(Porter) Staudt +
Fragaria vesca var. americana +
Fraisier américain +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Conn. +, Ill. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Miss. +, Nebr. +, N.H. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, S.Dak. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–1900 m +
Open forests, forest edges, clearings, along trails and roadsides, open grasslands, often on steep, rocky slopes and outcrops +
Flowering spring. +
Canad. J. Bot. +
Endemic +  and Illustrated +
F. americana +
Fragaria vesca subsp. americana +
Fragaria vesca +
subspecies +