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Silphium asteriscus

Family: asteraceae
Common name(s): Starry Rosinweed
Hardiness ratings: USDA zone 4 - 8

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup
• Dave's Garden. Search the extensive PlantFiles database.

Links for Silphium asteriscus

• Carolina Nature - Photos of this native plant, often with notes on habitat and identification. (4 photos)
• Garden.org - Community-assembled plant profile (3 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (6 photos)
• Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (10 photos)
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 4-8a) (4 photos)
• Ontario Rock Garden Society - Germination information

Silphium asteriscus var. laevicaule

Links

• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (1 photo)

Silphium asteriscus var. simpsonii

Common name(s): Simpson's Rosinweed; Starry Rosinweed
Hardiness ratings: USDA zone 6

Links

• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 6)

Silphium asteriscus var. trifoliatum