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Family: plantaginaceae
Common name(s): Purple mountain bugler, San Bernardino Beardtongue
General resources
- Wikipedia. Online encyclopedia entry (if defined).
- Google images. Web search for photographs.
- GRIN. Taxonomical details, with common names, distribution, and synonyms.
- Dave's Plants. Search the extensive PlantFiles database.
Links for Penstemon caesius
- American Penstemon Society - Detailed description of the species' botanical characteristics, habitat, and native range.
- Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 4 to 6)
 (2 photos)
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