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Family: papaveraceae
Common name(s): celandine poppy
Hardiness ratings: USDA zone 4~4b - 9 
General resources
Links for Stylophorum diphyllum
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-9)
 (18 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 4) (4 photos)
- Digging Dog Nursery - Catalog page with descriptive information (zone 4)
- Garden.org - Community-assembled plant profile (15 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (4 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (45 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) (12 photos)
- NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 4b-9a) (12 photos)
- Ontario Rock Garden Society - Germination information
- Plant Delights Nursery - Catalog page with photo, horticultural basics, and descriptive blurb. (1 photo)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 4-9)
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