Penstemon digitalis (foxglove beard-tongue, foxglove beardtongue, or talus slope penstemon) is a plant in the plantain family, Plantaginaceae. The flowers are white and are borne in summer. It is native to eastern Canada and eastern and southeastern United States. (Wikipedia)

Penstemon cobaea is a flowering plant in the plantain family, commonly known as cobaea beardtongue, prairie beardtongue or foxglove penstemon. The plant is native to the central United States, primarily the Great Plains from Nebraska to Texas, with additional populations in the Ozarks of Missouri and Arkansas. There are also populations reported in the southwestern United States as well as in Illinois and Ohio, but these appear to be introcutions. (Wikipedia)

Penstemon newberryi is a species of penstemon known by the common name mountain pride. 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... (Wikipedia)

Penstemon spectabilis is a species of penstemon known by the common name showy penstemon. It is native to southern California and Baja California, where it grows in the chaparral, scrub, and woodlands of the coastal mountain ranges. (Wikipedia)

Penstemon heterophyllus is a species of penstemon known by the common names bunchleaf penstemon, foothill penstemon, and foothill beardtongue. It is endemic to California.... (Wikipedia)

Penstemon hirsutus is a species of flowering plant in the plantain family known by the common name hairy beard-tongue. It is native to the eastern Canada and the United States. (Wikipedia)

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Penstemon palmeri, the Palmer's penstemon, is a perennial penstemon notable for its showy, rounded flowers, and for being one of the few scented penstemons. The plant, in the Plantaginaceae family, is named after the botanist Edward Palmer. (Wikipedia)

Penstemon eatonii is a species of penstemon known by the common name firecracker penstemon. (Wikipedia)

Keckiella antirrhinoides (formerly Penstemon antirrhinoides) is a species of flowering shrub in the plantain family known by the common names snapdragon penstemon and chaparral beardtongue. (Wikipedia)

Penstemon davidsonii is a species of penstemon known by the common name Davidson's penstemon, honoring Dr. George Davidson. It is native to North America from the Sierra Nevada Range in California and Nevada through the Coast and Cascade ranges of Oregon and Washington into British Columbia. (Wikipedia)

Penstemon rydbergii, commonly known as Rydberg's penstemon or meadow penstemon, is a perennial plant in the snapdragon family (Scrophulariaceae) that grows in damp, grassy meadows of the Great Basin of the western United States.:49 (Wikipedia)

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Penstemon speciosus is a species of penstemon known by the common name royal penstemon. It is native to the western United States where it can be found in many types of habitat, including plateau and foothill scrub and subalpine mountain forests. It is a perennial herb growing erect to a maximum height near 60 centimeters. The leaves are usually lance-shaped and sometimes folded lengthwise, measuring up to 9 centimeters long. They are arranged oppositely and often... (Wikipedia)

Penstemon parryi, the Parry's penstemon, Parry's beardtongue or desert penstemon, is a wildflower native to the Sonoran Desert of Southern Arizona and northern Mexico. It is a perennial that blooms in March and April. In the wild, plants flower in their second year. In cultivation, flowering is often achieved in the first year if seed is planted in the autumn. (Wikipedia)

Penstemon serrulatus is a species of penstemon known by the common names Cascade penstemon, coast penstemon, or serrulate penstemon. It is native to the Pacific Northwest of North America, from Oregon to Alaska. (Wikipedia)