Penstemon laetus var. laetus
Mountain blue penstemon
Photo by Chez Brungraber
Family: Plantaginaceae · Type: Subshrub · Native
Penstemon laetus var. laetus (Mountain blue penstemon) is a native California subshrub in the Plantaginaceae family, recognized by leaf width and open flower throat.
Mountain blue penstemon is a California native perennial found in the Sierra Nevada and western Transverse Ranges in foothill to montane forest at elevations of 400 to 2,500 meters. Flowering from May to July, this plant produces blue flowers with an open throat and spreading lips. Growing with stems 15 to 45 centimeters tall, it develops compact clusters of delicate blossoms. Its leaves are narrow, ranging from 2 to 11 millimeters wide, providing a delicate green backdrop to the vivid blue flowers. The plant's calyx is 4.7 to 9 millimeters long, with widely lanceolate lobes that complement its distinctive floral structure.
Identification and appearance
Key characters: 34 sympatric species; distinguished by leaf width and open flower throat
Habitat and range
Habitat: Foothill to montane forest
Elevation: 400-2500 m
California counties: Kern, Tulare, Calaveras, Fresno, Tuolumne, Madera, Placer, Mariposa, El Dorado, Plumas, Ventura, Orange, Amador, Trinity, Yuba, Siskiyou, Nevada, Butte
Bloom period
Penstemon laetus var. laetus blooms May-Jul.
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 laetus var. laetus native to California?
Yes. Penstemon laetus var. laetus is native to California (recorded as native).
When does Penstemon laetus var. laetus bloom?
Penstemon laetus var. laetus blooms May-Jul.
Where in California does Penstemon laetus var. laetus grow?
Penstemon laetus var. laetus occurs in Kern, Tulare, Calaveras, Fresno, Tuolumne, Madera, Placer, Mariposa and other counties, at elevations of 400-2500 m.
What plant family does Penstemon laetus var. laetus belong to?
Penstemon laetus var. laetus is in the Plantaginaceae family, genus Penstemon.
What habitat does Penstemon laetus var. laetus grow in?
Penstemon laetus var. laetus grows in Foothill to montane forest.
Related species
Other California species in the same genus, family, or bioregion.
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.