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Penstemon glaber

Family: plantaginaceae
Hardiness ratings: USDA zone 4 - 9

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Penstemon glaber

• American Penstemon Society - Detailed description of the species' botanical characteristics, habitat, and native range. (1 photo)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-9a) (1 photo)
• Garden.org - Community-assembled plant profile (2 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (2 photos)
• Ontario Rock Garden Society - Germination information

Penstemon glaber var. alpinus

Common name(s): sawsepal penstemon

Links

• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (2 photos)
• Ontario Rock Garden Society - Germination information (additional information for other varieties). Also a page for another instance.
• Rob's Plants: Penstemon glaber var. alpinus - Plant profile with basic horticultural information and often personal observations. Also seed germination records.

Penstemon glaber var. glaber

Links

• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (1 photo)