Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 8-11) (9 photos)
Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (8 photos). Also a page for another instance.
PlantzAfrica - Features South African plants, with photos, description, distribution and ecology, and uses. (6 photos). Also a page for another instance.