Perennials, eglandular; rhizomatous. Stems usually simple, sometimes ± branched. Heads radiate. Ray florets fewer than disc florets, in 1 series (conspicuous). Disc corollas ± ampliate, lobes erect. Pappi shorter than to equaling disc florets at flowering. x = 8.

Distribution

w North America.

Discussion

Species 12 (12 in the flora).

Selected References

Allen, G. A. 1984. Morphological and cytological variation within the western North American Aster occidentalis complex (Asteraceae). Syst. Bot. 9: 175–191.

Lower Taxa

Symphyotrichum bracteolatum, Symphyotrichum chilense, Symphyotrichum cusickii, Symphyotrichum foliaceum, Symphyotrichum greatae, Symphyotrichum hallii, Symphyotrichum hendersonii, Symphyotrichum jessicae, Symphyotrichum lentum, Symphyotrichum molle, Symphyotrichum spathulatum, Symphyotrichum subspicatum