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Penstemon × mexicali

Family: plantaginaceae
Common name(s): beardtongue
Hardiness ratings: USDA zone 4b~5 - 8~9

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 × mexicali

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-9) (6 photos)
• Digging Dog Nursery: Penstemon x mexicali 'Pike's Peak Purple' - Catalog page with descriptive information (additional pages for other varieties) (zone 5)
• Garden.org: Penstemon x mexicali 'Carillo Purple' - Community-assembled plant profile (4 varieties in database) (2 photos)
• Heritage Perennials: Penstemon x mexicali Red Rocks - Profile with description and horticultural details. (zone 5-9) (1 photo)
• North Carolina State University factsheet: Penstemon x mexicali Red Rocks® 'P008S' - Plant profile with horticultural details and comments (zone 5-8) (9 photos)
• Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
• Plant Delights Nursery: Penstemon mexicali 'Pike's Peak Purple' - Catalog page with photo, horticultural basics, and descriptive blurb. (additional pages for other varieties) (zone 4b-8a) (1 photo)
• Rob's Plants: Penstemon x mexicali 'Red Rocks' - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 5-9) (1 photo)