Penstemon heterodoxus
Sierra beardtongue
Photo by Chez Brungraber
Family: Plantaginaceae · Type: Subshrub · Native
Penstemon heterodoxus (Sierra beardtongue) is a native California subshrub in the Plantaginaceae family, recognized by mat-forming habit and small deep blue flowers distinguish it from most alpine penstemons.
Sierra beardtongue is a California native perennial herb found in montane and alpine habitats of the Sierra Nevada Mountains at elevations typically ranging from 2,000 to 3,500 meters. Flowering from July to August, this plant produces deep blue-purple flowers with a yellow-brown hairy flower floor, creating a striking contrast in color and texture. Growing as a mat-forming perennial with stems 5 to 65 centimeters tall, it develops a compact, low-growing structure with nearly glabrous herbage. Its leaves are predominantly basal with narrow cauline leaves that are lanceolate to ovate, sometimes folded lengthwise, and growing in an entire arrangement. The plant's distinctive corolla is cylindric to moderately expanded, measuring 10 to 16 millimeters long, with glandular outer surfaces and a uniquely colored flower interior.
Identification and appearance
Key characters: 46 sympatric species; mat-forming habit and small deep blue flowers distinguish it from most alpine penstemons
Habitat and range
California counties: Fresno, Tulare, Mono, Tuolumne, Inyo, Madera, El Dorado, Placer, Mariposa, Siskiyou, Sierra, Alpine, Amador, Trinity, Plumas, Nevada
How to tell it apart
vs Epilobium: Penstemon has tubular two-lipped flowers with five stamens; Epilobium has four-petaled open flowers with eight stamens.; vs Keckiella: Penstemon is herbaceous and dies back; Keckiella has persistent woody stems year-round.; vs Salvia: Penstemon has five stamens (one sterile); Salvia has only two fertile stamens and square stems.; vs Ipomopsis: Penstemon has two-lipped tubular flowers; Ipomopsis has star-shaped flowers with five equal lobes.; vs Antirrhinum: Penstemon has a sterile stamen visible inside; Antirrhinum has only four stamens, none sterile.
Frequently asked questions
Is Penstemon heterodoxus native to California?
Yes. Penstemon heterodoxus is native to California (recorded as native).
Where in California does Penstemon heterodoxus grow?
Penstemon heterodoxus occurs in Fresno, Tulare, Mono, Tuolumne, Inyo, Madera, El Dorado, Placer and other counties.
What plant family does Penstemon heterodoxus belong to?
Penstemon heterodoxus is in the Plantaginaceae family, genus Penstemon.
Related species
Other California species in the same genus, family, or bioregion.
- Penstemon heterodoxus var. cephalophorus — Sierra beardtongue
- Penstemon heterodoxus var. heterodoxus — Sierra beardtongue
- Penstemon heterodoxus var. shastensis — Shasta beardtongue
- Penstemon heterophyllus — Bunchleaf penstemon
- Penstemon heterophyllus var. australis — Southern foothill penstemon
- Penstemon heterophyllus var. heterophyllus — Foothill penstemon
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.