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Family: apocynaceae
Common name(s): whorled milkweed
Hardiness ratings: USDA zone 3~4 - 9~10 
General resources
Links for Asclepias verticillata
- Annie's Annuals (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 4-10)
 (1 photo)
- Carolina Nature - Photos of this native plant, often with notes on habitat and identification. (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-9) (3 photos)
- Garden.org - Community-assembled plant profile (20 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
- Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (9 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (29 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 4-9) (3 photos)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (6 photos)
- Native Plant Society of Texas - Plant profile with basic characteristics, some horticultural information, and a distribution map within Texas. (3 photos)
- Native Plants of Central Texas - Photos with brief comments from University of Texas at Austin. (4 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 4-9) (7 photos)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. (1 photo)
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