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Family: plantaginaceae
Common name(s): foxglove beardtongue
Hardiness ratings: USDA zone 2~4 - 8~10 
General resources
Links for Penstemon digitalis
- Annie's Annuals: Penstemon digitalis 'Mystica' (on archive.org) - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 2-10)
 (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 2-8) (7 photos)
- Garden.org - Community-assembled plant profile (4 varieties in database) (13 photos)
- Heritage Perennials: Penstemon digitalis 'Husker Red' - Profile with description and horticultural details. (zone 3-9) (1 photo). Also a page for DAKOTA™ Burgundy.
- 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 (7 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (29 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 3-8) (6 photos). Also pages for 'Blackbeard', 'Husker Red', 'Onyx and Pearls', and 'Pocahontas'.
- Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (11 photos)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3-8) (19 photos). Also a page for 'Huskers Red'.
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Plant Delights Nursery: Penstemon digitalis 'Husker Red' - Catalog page with photo, horticultural basics, and descriptive blurb. (zone 3-9) (1 photo)
- Rob's Plants: Penstemon digitalis 'Husker Red' - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (2 photos)
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