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Family: plantaginaceae
General resources
- Wikipedia. Online encyclopedia entry (if defined).
- Google images. Web search for photographs.
- GRIN. Taxonomical details, with common names, distribution, and synonyms.
Links for Penstemon whippleanus
- 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 3-10) (1 photo)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zones 4a-8b) (2 photos)
- Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (1 photo)
- Rock Garden Plant Database - Encyclopedic entry with taxonomical, botanical, and horticultural details.
- Rocky Mountain Rare Plants - Photo. Also a page for (pale form).
- Wild Ginger Farm - One of the plants featured on this specialty nursery's catalog page, with photo and brief description. (2 photos)
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