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Family: plantaginaceae
Common name(s): beard tongue
Hardiness ratings: USDA zone 4 - 8~11 
General resources
Links for Penstemon tubaeflorus
- 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 4-11) (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-8) (4 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
- Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (8 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (4 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) (1 photo)
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (11 photos)
- Ontario Rock Garden Society - Germination information
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 4-8) (2 photos)
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