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Petrophytum caespitosum

Family: rosaceae
Common name(s): Rock Spiraea
Hardiness ratings: USDA zone 3~5 - 8~9

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 Petrophytum caespitosum

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-9) (4 photos)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 3) (2 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (2 photos)
• Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 5-8) (4 photos)
• Ontario Rock Garden Society - Germination information
• Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 5-8)
• Swedishrockgarden - Photo of the species. (1 photo)
• Virginia Tech Dendrology - Factsheet with botanical characteristics and photos of various features. (4 photos)

Petrophytum caespitosum var. caespitosum

Links

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