Annie's Annuals - Catalog page with photo, basic horticultural information, and noteworthy features. (additional cultivars listed in catalog) (1 photo). Also pages for 'Salmon Queen' and 'Salmon Princess'.
Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 7-9) (17 photos)
Denver Botanic Gardens - Description, native range, and cultural requirements. (3 photos)