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Family: apiaceae
Common name(s): eryngo
Hardiness ratings: USDA zone 2~5 - 8~9 
General resources
Links for Eryngium alpinum
- BBC Gardening - Plant profile with horticultural details and garden uses.
 (1 photo)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-8) (1 photo)
- Digging Dog Nursery - Catalog page with descriptive information (zone 5)
- Garden.org - Community-assembled plant profile (2 varieties in database) (3 photos)
- Heritage Perennials: Eryngium alpinum ‘Blue Star’ - Profile with description and horticultural details. (additional pages for other varieties) (zone 3-9) (1 photo)
- 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 2-8). Also a page for 'Blue Star'.
- NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)
- Ontario Rock Garden Society - Germination information (additional information for other varieties)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records.
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