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Family: plantaginaceae
Common name(s): bearded penstemon
Hardiness ratings: USDA zone 3~6 - 8~9 
General resources
Links for Penstemon barbatus
- American Penstemon Society - Detailed description of the species' botanical characteristics, habitat, and native range.
- BBC Gardening: Penstemon barbatus 'Iron Maiden' - 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 4-9) (14 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (zone 6) (8 photos)
- Garden.org - Community-assembled plant profile (12 varieties in database) (2 photos)
- Heritage Perennials: Penstemon barbatus ‘Twizzle Purple’ - Profile with description and horticultural details. (additional pages for other varieties) (zone 3-9) (1 photo)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (34 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 4-8). Also pages for 'Elfin Pink' and 'Jingle Bells'.
- Ontario Rock Garden Society - Germination information (additional information for other varieties)
- Paghat's Garden: Penstemon barbatus 'Bashful' - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (1 photo). Also a page for 'Prairie Dusk'.
- Plant Delights Nursery: Penstemon barbatus 'Elfin Pink' - Catalog page with photo, horticultural basics, and descriptive blurb. (additional pages for other varieties) (1 photo)
- Southwest Colorado Wildflowers - Photos and botanical information about the species/genus. (2 photos)
Common name(s): bearded penstemon
Hardiness ratings: USDA zone 3 - 8
Links
- Garden.org - Community-assembled plant profile (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 3-8) (1 photo)
Common name(s): Pinacolada Beard-tongue
Hardiness ratings: USDA zone 3 - 9
Links
Links
Links
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