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Family: plantaginaceae
Common name(s): gray beard-tongue
Hardiness ratings: USDA zone 5 - 5~8 
General resources
Links for Penstemon canescens
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-o)
 (4 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (6 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 5-8) (2 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 5-8) (10 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (1 photo)
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