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Family: fumariaceae
Common name(s): Bird In A Bush; Hollow Root
Hardiness ratings: USDA zone 6~6b - 8 
General resources
Links for Corydalis cava
- All Things Plants - Community-assembled plant profile
 (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6b-8) (2 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 6) (1 photo)
- Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
- Ontario Rock Garden Society - Germination information (additional information for other varieties)
- Pacific Bulb Society - One of the plants described on this page about the genus. (13 photos)
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