Erigeron strigosus var. septentrionalis

(Fernald & Wiegand) Fernald

Rhodora 44: 340. 1942.

Common names: Vergerette du Nord
Basionym: Erigeron ramosus var. septentrionalis Fernald & Wiegand Rhodora 15: 60. 1913
Synonyms: Erigeron annuus subsp. septentrionalis (Fernald & Wiegand) Wagenitz
Treatment appears in FNA Volume 20. Treatment on page 346. Mentioned on page 345.

Annuals or biennials; rhizomes none. Stems sparsely and loosely strigose (hairs ascending to spreading, 0.5–1 mm). Leaves: basal broadly oblanceolate or oblanceolate, 5–15(–20) mm wide, margins usually dentate, faces sparsely strigose or strigoso-hirsute. Involucres (2.5–)3–4 mm. Phyllaries strigose (hairs flattened, 0.5–1.2 mm).

Phenology: Flowering (Apr–)May–Oct.
Habitat: Mostly in open, disturbed sites
Elevation: 20–1000 m



Alta., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Ark., Calif., Conn., Idaho, Iowa, Maine, Mass., Mich., Minn., Mo., N.H., N.Y., N.Dak., Okla., Oreg., S.Dak., Tenn., Vt., Wash., Wis., Wyo., introduced in Europe.


The distributional data given here are highly provisional; the author has not attempted to sort this taxon accurately, if it can be. According to A. Cronquist (1947), var. septentrionalis is scattered mostly in the northern half of the continent and (1994) is “found chiefly in New England and adjacent Canada.” It is “morphologically transitional” to Erigeron annuus (A. Cronquist 1994) and, as implied by the synonymy, may be more appropriately treated as part of E. annuus (D. Frey et al. 2003). As noted by Fernald in the original description, the stems may be nearly glabrous or lightly hispid, in contrast to the more densely strigose to strigillose ones of typical E. strigosus.

Selected References


Lower Taxa

Guy L. Nesom +
(Fernald & Wiegand) Fernald +
Erigeron ramosus var. septentrionalis +
Vergerette du Nord +
Alta. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ark. +, Calif. +, Conn. +, Idaho +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.Y. +, N.Dak. +, Okla. +, Oreg. +, S.Dak. +, Tenn. +, Vt. +, Wash. +, Wis. +, Wyo. +  and introduced in Europe. +
20–1000 m +
Mostly in open, disturbed sites +
Flowering (Apr–)May–Oct. +
Erigeron annuus subsp. septentrionalis +
Erigeron strigosus var. septentrionalis +
Erigeron strigosus +
variety +