General:
Perennial herb from a creeping rhizome; stems erect, solitary, branched above, with spreading, long hairs and stalked glands, at least above, 0.3-1.0 m tall.

Leaves:
Basal leaves smaller than the others, usually deciduous by flowering time; stem leaves lanceolate, 5-15 cm long, 1-4 cm wide, unstalked, more or less clasping, glabrous above, sparsely hairy beneath, margins smooth to few toothed.

Flowers:
Heads with ray and disk flowers, few to many in a branched, leafy, usually short inflorescence, bases glandular; involucres 7-11 mm tall; involucral bracts equal or subequal, linear to linear-lanceolate, with long-pointed tips, densely stalked-glandular, the outer leaflike, the inner often purplish; ray flowers 20-45, purple or violet, 8-15 mm long; disk flowers yellow.

Fruits:
Achenes strongly 5-ribbed, sparsely hairy; pappus whitish to yellowish.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia

Flower Colour:
Purple

Blooming Period:
Summer

Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall

Source:  The USDA

Synonyms and Alternate Names:
Aster major (Hook.) Porter
Aster modestus Lindl.
Aster unalaschkensis var. major Hook.
Weberaster modestus (Lindl.) A. Löve & D. Löve