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Penstemon filiformis
Also called Keck Threadleaf Beardtongue, Thread Leaved Beardtongue, Thread Leaved Penstemon
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.
Threadleaf penstemon is endemic to the state of California where it grows in the Klamath Mountains. The known populations grow in Lake, Shasta, Siskiyou, and Trinity counties. It is found above 400 meters (1,300 ft) and below 600 m (2,000 ft). The area of its range is between 1,000 and 5,000 square kilometers (400 and 1,900 sq mi).
Firleaf beardtongue · Stemless beardtongue · Sharpleaf penstemon · Los Alamos beardtongue · Alberta beardtongue · White penstemon · White River Beardtongue · Whitemargin beardtongue · Gilia beardtongue · Penstemon angelicus · Siskiyou beardtongue · Broadbeard beardtongue
Text excerpted from the Wikipedia article Penstemon filiformis by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
