Symphyotrichum laeve var. geyeri

(A. Gray) G. L. Nesom

Phytologia 77: 284. 1995.

Common names: Geyer’s aster
Basionym: Aster laevis var. geyeri A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 183. 1884
Synonyms: Aster geyeri (A. Gray) Howell Aster laevis subsp. geyeri (A. Gray) Piper Aster laevis var. guadalupensis A. G. Jones
Treatment appears in FNA Volume 20. Treatment on page 509. Mentioned on page 503, 508.

Leaves lanceolate to ovate, conspicuously auriculate-clasping, less than 5 times as long as wide. Phyllaries unequal, apical green zones lanceolate. 2n = 48.


Phenology: Flowering (Jul–)Aug–Oct.
Habitat: Open, dry habitats, mixed- and tallgrass prairies, open pine forests, montane meadows, edges of aspen groves, edges of montane forests, clearings, roadsides
Elevation: 300–2400 m

Distribution

V20-1135-distribution-map.gif

Alta., B.C., Man., Ont., Sask., Yukon, Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., N.Dak., S.Dak., Tex., Utah, Wash., Wyo., Mexico (Coahuila).

Discussion

The distribution of var. geyeri forms a continuous arc across the Canadian mixed-grass prairies and aspen parkland into the Northern Rockies, and south in a discontinuous manner in the Central Rockies and the Black Hills, to Guadalupe Peak, western Texas. It is disjunct in northern Coahuila, Mexico (G. L. Nesom 1993g). The species was recently reported for California (tentatively assigned to this variety), where possibly it has been introduced.

Selected References

None.

Lower Taxa

None.
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(A. Gray) G. L. Nesom +
Aster laevis var. geyeri +
Geyer’s aster +
Alta. +, B.C. +, Man. +, Ont. +, Sask. +, Yukon +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wyo. +  and Mexico (Coahuila). +
300–2400 m +
Open, dry habitats, mixed- and tallgrass prairies, open pine forests, montane meadows, edges of aspen groves, edges of montane forests, clearings, roadsides +
Flowering (Jul–)Aug–Oct. +
Aster geyeri +, Aster laevis subsp. geyeri +  and Aster laevis var. guadalupensis +
Symphyotrichum laeve var. geyeri +
Symphyotrichum laeve +
variety +