E-Flora BC: Electronic Atlas of the Flora of British Columbia

Symphyotrichum frondosum (Nutt.) G.L. Nesom
short-rayed aster (alkali aster)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #5136)

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Distribution of Symphyotrichum frondosum
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Species Information

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General:
Annual herb from a taproot; stems decumbent to erect, much branched, more or less glabrous, 10-60 cm tall.
Leaves:
Basal leaves soon deciduous; stem leaves linear to oblanceolate, stalked below to unstalked above, 2-6 cm long, 5-10 mm wide, entire, glabrous or fringed with stiff hairs on the margins.
Flowers:
Heads with ray and disk flowers, several to numerous in an open or spikelike, branched inflorescence; involucres 5-9 mm tall; involucral bracts subequal to moderately graduated, linear-lanceolate to linear spoon-shaped, the inner pale-margined, the outer leafy, the tips obtuse; ray flowers white, drying pinkish to pink-purple, 1.5-2 mm long, barely exceeding the disk flowers; disk flowers yellow.
Fruits:
Achenes appressed-hairy; pappus white, surpassing the disk flowers.
Notes:
Although this species was first collected in 1939 and reported by Eastham (1947) from the Okanagan Valley, it was not recollected again until 1993 along Osoyoos Lake.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist lakeshores in the steppe zone; rare in SC BC, known recently only from Osoyoos Lake; S to UT, AZ, NM and CA.

Source: The Illustrated Flora of British Columbia

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Aster frondosus (Nutt.) Torr. & A. Gray
Brachyactis frondosa (Nutt.) A. Gray
Tripolium frondosum Nutt.

Taxonomic and Nomenclatural Links

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General References