Penstemon anguineus is a species of penstemon known by the common name Siskiyou beardtongue. It is native to the mountains of Oregon and northern California, where it grows in coniferous forests, often in open areas left by logging operations. It is a perennial herb reaching up to about 90 centimeters in maximum height. The oppositely arranged leaves are lance-shaped to oval, the ones higher on the plant clasping the stem. The inflorescence produces several light blue or purple flowers between 1 and 2 centimeters long. The sepals and flowers are coated in glandular hairs. The inside of the flower has many long hairs and the staminode has a sparse hair coating.
Penstemon azureus is a flowering plant species known by the common name azure penstemon.
Penstemon caesius is a species of penstemon known by the common name San Bernardino beardtongue. It is endemic to California, where it is known from the San Bernardino and San Gabriel Mountains, as well as the southern mountains of the Sierra Nevada. It is a member of the flora on rocky slopes and in coniferous forests and alpine habitat in the mountains. It is a perennial herb with erect branches up to about 80 centimeters in maximum height. The lower branches may be woody, the upper hairless and waxy, and the inflorescence glandular. Most of the leaves are basal on the plant, rounded or oval, and up to about 4 centimeters long. The inflorescence produces purple-blue tubular flowers roughly 2 centimeters long. The flower has a glandular outer surface, a coat of hairs inside, and a hairless staminode. The flowers of this penstemon are pollinated by bees of genus Osmia, which feed on their nectar.
Penstemon calcareus is a species of penstemon known by the common name limestone beardtongue. It is native to California, where it is known from the deserts of central San Bernardino County, as well as the Death Valley area, where its distribution extends just over the border into Nevada. It grows in scrub and woodland, often on limestone substrates. It is a perennial herb with erect branches up to about 25 centimeters in maximum height, grayish with a coating of fine hairs. The toothed, lance-shaped leaves are up to 6 centimeters long. The inflorescence produces bright pink to purplish tubular or funnel-shaped flowers between 1 and 2 centimeters long. The flower has a glandular outer surface and a staminode coated with yellow hairs.
Penstemon filiformis is an uncommon species of penstemon known by the common name threadleaf beardtongue. It is endemic to the Klamath Mountains of northern California, where it grows in forest and woodland, often on serpentine soils. It is a perennial herb growing up to half a meter tall, its stem hairy and woody toward the base. The leaves are very narrow, linear and rolled to threadlike, reaching up to 7 centimeters long, those low on the plant sometimes borne in clusters. The inflorescence produces hairless, tubular or funnel-shaped blue to purple flowers just over a centimeter in length.
Penstemon floridus is a species of flowering plant in the plantain family known by the common names Panamint beardtongue and rose penstemon.
Penstemon gracilentus is a species of penstemon known by the common names slender beardtongue and slender penstemon. It is native to the mountains and sagebrush plateau of northeastern California, western Nevada, and southern Oregon, where it grows in forest, woodland, and scrub habitat. It is a perennial herb producing upright branches to about 65 centimeters in maximum height, the stems developing woody bases. The leaves are up to 10 centimeters in length and linear or lance-shaped. The glandular inflorescence produces several tubular purple flowers up to 2 centimeters long. The mouth of each flower may be hairless or coated in long hairs, and the staminode usually has a coat of yellow hairs.
Penstemon grinnellii is a species of penstemon known by the common name Grinnell's beardtongue. It is endemic to California, where it can be found in several mountain ranges from those around the San Francisco Bay Area to the Sierra Nevada to the Peninsular Ranges near the Mexican border. It is a perennial herb producing upright stems growing to 85 centimeters in maximum height. The leaves are oblong, up to 9 centimeters in length, folded lengthwise and curved backward. The glandular inflorescence produces several tubular purple-tinged white or violet flowers 1 to 2 centimeters long. The mouth of the flower has three lower lobes streaked with dark lines, a hairy throat and a long-haired, protruding staminode.
Penstemon heterodoxus is a species of penstemon known by the common name Sierra beardtongue. It is native to California and western Nevada where it grows in several of the mountain ranges from the Klamath Mountains to the Sierra Nevada - and the slopes and plateaus to the east. It grows in subalpine and alpine climates in mountain forests, meadows and talus.
Penstemon incertus is a species of penstemon known by the common name Mojave beardtongue. It is endemic to California, where it can be found in many of the southeastern mountain ranges, including the southern reaches of the Sierra Nevada, the Tehachapis, and the mountains of the Mojave Desert region. It is a member of the flora in scrub and woodland, among Joshua Trees and in sandy washes.
Penstemon monoensis is a species of penstemon known by the common name Mono penstemon. It is endemic to the White and Inyo Mountains of eastern California, where it grows in scrub, woodland, and sandy washes. It is a perennial herb growing erect to about 30 centimeters tall, gray-green in color from a dense coating of light hairs. The paired leaves are lance-shaped, sometimes toothed or wavy along the edges and up to 12 centimeters long. The glandular inflorescence bears cylindrical or funnel-shaped flowers in shades of bright to deep pink, measuring around 2 centimeters in length. The mouth of the flower may have a white or pale area on the floor with a patch of hairs, and the staminode is usually hairy.
Penstemon neotericus is a species of penstemon known by the common name Plumas County beardtongue. It is endemic to California, where it is known from the northern Sierra Nevada and adjacent southern peaks of the Cascade Range. It grows in forest, scrub, and other mountain habitat. It is a perennial herb growing erect to about 80 centimeters tall, becoming woody toward the base. The paired leaves are lance-shaped and nearly 9 centimeters in maximum length. The glandular inflorescence bears blue-purple or pinkish flowers up to 4 centimeters long. The flowers have white, mostly hairless mouths and hairless staminodes.
Penstemon newberryi is a species of penstemon known by the common name mountain pride or Newberry's penstemon. It is native to the mountains of northern California, Oregon, and Nevada, where it grows in rocky habitat, often at high elevation, such as talus. It is a bushy, mat-forming subshrub growing up to 30 centimeters tall. The leaves are mostly basal on the plant, oblong or oval and toothed, measuring 1 to 4 centimeters in length, with a few smaller pairs along the stem. The glandular inflorescence bears showy magenta flowers 2 to over 3 centimeters in length. The flower is generally tubular or funnel-shaped and has a coating of short to long and curly hairs in the mouth and on the staminode.
Penstemon papillatus is a species of penstemon known by the common name Inyo beardtongue.
Penstemon purpusii is an uncommon species of penstemon known by the common name Snow Mountain beardtongue. It is endemic to northern California, where it is known only from the Klamath Mountains and northern peaks of the North Coast Ranges. It grows in rocky open and forested mountain habitat. It is a perennial herb growing to a maximum height of 20 centimeters from a woody base. The leaves are 1 to 3 centimeters long, widely lance-shaped and sometimes folded lengthwise. The glandular inflorescence bears tubular flowers up to 3 centimeters long. They are generally purple-blue in color, often with white throats.
Penstemon roezlii is a species of penstemon known by the common name Roezl's penstemon. It is native to Oregon, western Nevada, and adjacent sections of northern California, including the Klamath Mountains and Sierra Nevada, where it grows in sagebrush and forest habitat types. It is a hairy, erect perennial herb growing to a maximum height of 55 centimeters from a woody, branching base. The leaves are up to 7 centimeters long, linear to widely lance-shaped and often folded lengthwise. The glandular inflorescence bears wide-mouthed tubular flowers up to 2.2 centimeters long in shades of blue-purple. The flowers are mostly hairless except for thin glandular hairs on the outer surfaces.
Penstemon rostriflorus is a species of penstemon known by the common names beaked penstemon, Bridge penstemon, or Bridges' penstemon.
Penstemon spectabilis is a species of penstemon known by the common name showy penstemon or showy beardtongue. It is native to southern California and Baja California, where it grows in the chaparral, scrub, and woodlands of the coastal mountain ranges.
Penstemon utahensis is a species of penstemon known by the common names Utah beardtongue and Utah penstemon. It is native to the southwestern United States, where it grows in scrub, woodland, and canyons. It is a perennial herb growing erect to a maximum height near half a meter. The thick leaves are located around the base of the plant and in opposite pairs along the stem. The upper leaves are lance-shaped and often folded lengthwise, measuring up to 5.5 centimeters long. The showy inflorescence bears many bright red-pink flowers up to 2.5 centimeters in length. They are cylindrical, tubular, or funnel-shaped with wide, lobed mouths, and mostly hairless to slightly hairy and glandular.
Penstemon rhizomatosus is a rare species of flowering plant in the plantain family known by the common names Scheel Creek beardtongue and rhizome beardtongue. It is endemic to Nevada in the United States, where it occurs only in the Schell Creek Range of White Pine County.
