perennial

Penstemon filiformis (D.D. Keck) D.D. Keck

Penstemon filiformis (D.D. Keck) D.D. Keck. Penstemon filiformis is an uncommon species of Penstemon known by the common name threadleaf penstemon. It is endemic to the Klamath Mountains of northern California, where it grows in forest and woodland, often on serpentine soils.

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Penstemon filiformis (D.D. Keck) D.D. Keck — seeds, tools & books

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Native range

Native range not recorded for this plant. Often a non-native cultivar or naturalized garden plant.

Related plants

Sources

USDA PLANTS