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Echinocactus horizonthalonius

Family: cactaceae
Common name(s): eagle claw cactus; devilshead
Hardiness ratings: USDA zone 8b

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 Echinocactus horizonthalonius

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (12 photos)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 8b)
• Garden.org - Community-assembled plant profile (1 photo)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (55 photos)

Echinocactus horizonthalonius var. horizonthalonius