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Penstemon speciosus

Penstemon speciosus (*)

Familia: Plantaginaceae
Tribus: Cheloneae
Genus: Penstemon
Subgenus: P. subg. Habroanthus
Section: P. sect. Glabri

Species: Penstemon speciosus
Varietas & subspecies: P. s. subsp. kennedyi – P. s. var. piliferus

Penstemon speciosus Douglas ex Lindl.

Douglas, D. ex Lindley, J., Edwards's Bot. Reg. 15: t. 1270. 1829


International Plant Names Index. 2017. Penstemon speciosus. Published online. Accessed: Nov. 02 2017.
The Plant List 2013. Penstemon speciosus in The Plant List Version 1.1. Published on the internet. Accessed: 2017 Nov. 02. 2017. Penstemon speciosus. Missouri Botanical Garden. Published on the internet. Accessed: 02 Nov. 2017.
USDA, ARS, Germplasm Resources Information Network. Penstemon speciosus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Penstemon speciosus is a species of penstemon known by the common name royal penstemon of western North America.


Native to the western United States, it is most common east of the crest of the Cascade Range of Washington and Oregon; southern Idaho; mountainous California from the Klamath Ranges along the High Sierra Nevada to the Western Transverse Ranges, San Gabriel and San Bernardino Mountains; and scattered through the mountains of northern Nevada. It is associated with diverse habitats, from sagebrush scrub, plateau and foothill scrub to subalpine mountain forests. It spans a range of elevations but is most common from 3,000–9,000 feet (900–2,700 m).[1][2]

It is a perennial herb growing erect to a maximum height near 2–9 centimetres (3⁄4–3+1⁄2 in). The leaves are usually lance-shaped and sometimes folded lengthwise, usually less than 15 cm (6 in) long. They are arranged oppositely and often clasp the stem at the bases. The showy inflorescence bears tubular flowers with expanded mouths 26–38 mm (1–1+1⁄2 in) long. The flowers are light to deep blue, lavender, and purple, and usually have white throats. The white, generally hairless, throat helps to distinguish it from similar species within its range.[3][4]

Sullivan, Steven. K. (2020). "Penstemon speciosus". Wildflower Search. Retrieved 2020-09-22.
USDA, NRCS. (2020). "Penstemon speciosus". The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA. Retrieved 2020-09-22.
Giblin, David (Editor) (2020). "Penstemon speciosus". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2020-09-22.
"Penstemon speciosus". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2020. Retrieved 2020-09-22.

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