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Penstemon
Penstemon crandalliiSpecies

Penstemon crandallii ssp. atratus

Penstemon crandallii ssp. crandallii

Penstemon crandallii ssp. glabrescens

Penstemon crandallii ssp. procumbens

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Taxonomy based on ITIS

Phenology data provided by iNaturalist.org