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Family: hypericaceae
Common name(s): Shrubby St. Johnswort
Hardiness ratings: USDA zone 3~3b - 8 
General resources
Links for Hypericum prolificum
- Carolina Nature - Illustrated woody plant profile, with notes on range and identification.
 (1 photo)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-8) (6 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 3)
- Garden.org - Community-assembled plant profile (1 photo)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (15 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 3-8) (9 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 3b-8a) (15 photos)
- Ontario Rock Garden Society - Germination information
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