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Family: asteraceae
Common name(s): cup plant
Hardiness ratings: USDA zone 3~5 - 9 
General resources
Links for Silphium perfoliatum
- Connecticut Botanical Society - Wildflower profile.
 (3 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-9) (14 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 4) (6 photos)
- Garden.org - Community-assembled plant profile (28 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
- Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (12 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (50 photos)
- Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 3-9) (7 photos)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (7 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3-9a) (9 photos)
- Ontario Rock Garden Society - Germination information
- Plant Delights Nursery - Catalog page with photo, horticultural basics, and descriptive blurb. (1 photo)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. (4 photos)
Links
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