Cosmos atrosanguineus
Family: asteraceae
Common name(s): chocolate cosmos
Hardiness ratings: USDA zone 7~9 - 9~11 
General resources
Links for Cosmos atrosanguineus
- Annie's Annuals: Cosmos atrosanguineus 'Black Magic' (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 9-11)
 (1 photo)
- BBC Gardening - Plant profile with horticultural details and garden uses. (1 photo)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 8-10) (8 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 8)
- Digging Dog Nursery - Catalog page with descriptive information
- Floridata - Illustrated informative profile page with notes on culture, usage, and noteworthy features. (zone 7-10) (2 photos)
- Garden.org - Community-assembled plant profile (3 varieties in database) (12 photos)
- Heritage Perennials: Cosmos atrosanguineus ‘Choca Mocha’ - Profile with description and horticultural details. (additional pages for other varieties) (zone 9-9) (1 photo)
- Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
- 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 7-9)
- Pacific Bulb Society - One of the plants described on this page about the genus. (22 photos)
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations.
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