Symphyotrichum spathulatum var. intermedium

(A. Gray) G. L. Nesom

Phytologia 77: 292. 1995.

Basionym: Aster occidentalis var. intermedius A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 192. 1884
Synonyms: Aster vallicola Greene
Treatment appears in FNA Volume 20. Treatment on page 535.

Plants 40–80 cm. Leaves narrowly elliptic to oblanceolate. Heads 10–50(–75). 2n = 32, 48. 64.

Phenology: Flowering Jul–Aug.
Habitat: Grasslands and montane meadows, open coniferous forests
Elevation: 1200–2000 m



B.C., Calif., Idaho, Nev., Oreg., Wash.


Variety intermedium is found mainly in the northern part of the species range and is only occasional in California and Nevada.

Selected References


Lower Taxa

Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(A. Gray) G. L. Nesom +
Aster occidentalis var. intermedius +
B.C. +, Calif. +, Idaho +, Nev. +, Oreg. +  and Wash. +
1200–2000 m +
Grasslands and montane meadows, open coniferous forests +
Flowering Jul–Aug. +
Aster vallicola +
Symphyotrichum spathulatum var. intermedium +
Symphyotrichum spathulatum +
variety +