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

Dieteria canescens (Pursh) Nuttall
hoary aster (hoary tansyaster)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jim Riley  Email the photographer   (Photo ID #52480)

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Distribution of Dieteria canescens
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SUBTAXA PRESENT IN BC
Dieteria canescens var. canescens

Species Information

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General:
Biennial or short-lived perennial herb from a taproot; stems erect, several, branched, grey-hairy, 0.1-1.0 m tall.
Leaves:
Basal leaves simple, toothed, the teeth and the leaf tips spine-tipped, linear to more egg-shaped, 1.5-10 cm long, 3-15 mm wide, often deciduous; stem leaves similar, reduced, alternate.
Flowers:
Heads with ray and disk flowers, usually numerous in a rounded inflorescence; involucres 6-10 mm tall; involucral bracts linear to lance-linear or lance-oblong, grey-hairy or glandular or both, graduated, overlapping, with short, green, crimped tips; ray flowers bright purple, 8-25, 5-12 mm long; disk flowers yellow.
Fruits:
Achenes 2- to 4-nerved, somewhat compressed, finely silky-hairy, 2.5-4 mm long; pappus of soft white bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry grasslands, shrublands and forest openings in the steppe and lower montane zones; frequent in SC BC; E to SK and S to CO 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

Machaeranthera canescens (Pursh) A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References