Herrickia glauca var. glauca

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Scientific Name Herrickia glauca var. glauca (Eurybia glauca var. glauca) USDA PLANTS Symbol
Common Name Gray's Aster, Gray Aster ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet
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Description Life zones and habitat: Foothills and montane. Open, rocky slopes, sandy locations, forest margins.
Plant: Erect perennial growing in colonies with simple or branched, mostly hairless stems 8 to 28 inches tall.
Leaves: Greyish-green alternate, oblong to lanceolate leaves, tapering to a sharp point, 1-1/2 to 4-3/4 inches long; sessile with entire margins.
Inflorescence: Loose corymbiform arrays of many composite flower heads, each about 1 to 1-3/4 inches across, 8 to 19 light purple or lavender rays around a center of 12 to 32 disk florets, yellow later reddish; bell-shaped, hairless and glandless involucre with 4 to 5 rows of phyllaries pressed tightly around the body, outer one green, inner purplish.
Blooming period: July to September.
References: Descr. adapted from www.americansouthwest.net, Montana Field Guide and "Flora of Colorado" by Jennifer Ackerfield.
Colorado Status

© Tom Lebsack 2018