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Family: apocynaceae
Common name(s): pufferfish milkweed; balloon cottonbush
Synonym(s): Asclepias physocarpa
Hardiness ratings: USDA zone 7~8 - 10 
General resources
Links for Gomphocarpus physocarpus
- Annie's Annuals (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 7-10)
 (4 photos)
- Cretan Flora - Botanical profile of this plant occurring on Crete. (1 photo)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (8 photos)
- Garden.org - Community-assembled plant profile (15 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 8-10) (38 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 8-10) (7 photos)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- PlantzAfrica - Features South African plants, with photos, description, distribution and ecology, and uses. (8 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 7-10) (5 photos)
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