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Hypericum ascyron

Family: hypericaceae
Common name(s): Great St. Johnswort
Hardiness ratings: USDA zone 2

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Hypericum ascyron

• Asianflora - Plant photos. (1 photo)
• Connecticut Botanical Society - Wildflower profile. (3 photos)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 2)
• Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (2 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (2 photos)
• Ontario Rock Garden Society - Germination information
• Plant Delights Nursery - Catalog page with photo, horticultural basics, and descriptive blurb. (1 photo)

Hypericum ascyron subsp. pyramidatum

Common name(s): great St. John's wort
Synonym(s): Hypericum pyramidatum
Hardiness ratings: USDA zone 4 - 8

Links

• 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 4-8) (2 photos)
• Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (2 photos)
• Ontario Rock Garden Society - Germination information (additional information for other varieties). Also a page for another instance.