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Family: passifloraceae
Common name(s): blue passion flower
Hardiness ratings: USDA zone 6~8 - 9~11 
General resources
Links for Passiflora caerulea
- Annie's Annuals: Passiflora caerulea 'Constance Elliot' (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 6-10)
 (1 photo)
- BBC Gardening - Plant profile with horticultural details and garden uses. (1 photo). Also a page for 'Constance Elliott'.
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6-10) (59 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 8)
- Floridata - Illustrated informative profile page with notes on culture, usage, and noteworthy features. (zone 8-11) (1 photo)
- Garden.org - Community-assembled plant profile (2 varieties in database) (39 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 7-9) (5 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 6-10) (12 photos)
- Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (5 photos). Also a page for Mythology.
- Rainy Side Gardeners - Plant profile compiled by two gardeners in the Pacific Northwest. Includes propagation and pruning methods, and commentary. (zone 7-9) (2 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. (zone 7-10) (1 photo)
- Trees and Shrubs Online - Reference page curated by the International Dendrology Society with descriptive characteristics and horticultural notes.
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