Hardiness ratings: USDA zone 9 - 11
- Wikipedia. Online encyclopedia entry (if defined).
- Google images. Web search for photographs.
- GRIN. Taxonomical details, with common names, distribution, and synonyms.
- The Plant List. Taxonomical lookup
Links for Hibiscus calyphyllus
- All Things Plants - Community-assembled plant profile (3 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 9-11) (8 photos)
- PlantzAfrica - Features South African plants, with photos, description, distribution and ecology, and uses. (7 photos)