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Family: plantaginaceae
Common name(s): Gulf Coast penstemon
Hardiness ratings: USDA zone 7 - 9~10 
General resources
Links for Penstemon tenuis
- American Penstemon Society - Detailed description of the species' botanical characteristics, habitat, and native range.
 (1 photo)
- Annie's Annuals - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 7-10) (4 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 7-9) (13 photos)
- Garden.org - Community-assembled plant profile (14 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (34 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 7-10) (3 photos)
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