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Family: euphorbiaceae
Common name(s): castor bean
Hardiness ratings: USDA zone 8~9 - 11 
General resources
Links for Ricinus communis
- BBC Gardening: Ricinus communis 'Impala' - Plant profile with horticultural details and garden uses.
 (1 photo)
- Cretan Flora - Botanical profile of this plant occurring on Crete. (6 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 9-11) (45 photos)
- Denver Botanic Gardens: Ricinus communis 'Gibsonii' - Description, native range, and cultural requirements. (additional pages for other varieties) (6 photos)
- Floridata - Illustrated informative profile page with notes on culture, usage, and noteworthy features. (zone 8-11) (5 photos)
- Garden.org - Community-assembled plant profile (7 varieties in database) (28 photos)
- John and Jacq's Garden (on archive.org) - Informational page provided by home gardeners in Malaysia with details on culture and propagation. (zone 8-11) (9 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 9-11) (1 photo)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (6 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 9-11) (12 photos)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Rainy Side Gardeners - Plant profile compiled by two gardeners in the Pacific Northwest. Includes propagation and pruning methods, and commentary. (4 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 9-11) (4 photos)
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