Penstemon davidsonii
| Penstemon davidsonii | |
|---|---|
| |
| P. davidsonii var. menziesii, Olympic National Park, Washington | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae |
| Genus: | Penstemon |
| Species: | P. davidsonii
|
| Binomial name | |
| Penstemon davidsonii | |
Penstemon davidsonii is a species of penstemon known by the common name Davidson's penstemon, honoring Dr. George Davidson.[1] It is native to western North America.
Description
[edit]Penstemon davidsonii is a low, mat-forming perennial up to 10 centimetres (4 in) tall. The leaves are up to 1.5 cm (5⁄8 in) long, thick and firm, usually glabrous, with entire to serrulate margins. The leaves often have a paler green, tan, or reddish edge. The flowers are tubular, blue-lavender to purple, and large relative to the short stature of the plant. The calyx is covered with short hair.[2][3] Larger plants often flower abundantly, with the leaf mat nearly covered with the showy flowers.
Taxonomy
[edit]Penstemon davidsonii is included in Penstemon subgenus Dasanthera, along with P. barrettiae, P. cardwellii, P. ellipticus, P. fruticosus, P. lyallii, P. montanus, P. newberryi, and P. rupicola.[4]
Names
[edit]Penstemon davidsonii is known by several common names. It is occasionally called "Alpine penstemon".[5] The variety Penstemon davidsonii var. davidsonii is commonly called the "timberline penstemon".[6] It shares the name "creeping penstemon" with Penstemon teucrioides.[7][8]
Distribution and habitat
[edit]Penstemon davidsonii 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.[9]
It grows on rocks or in rocky soils in sunny mountain locations.[2]
Varieties
[edit]- P. davidsonii var. davidsonii – Davidson's penstemon
- P. davidsonii var. menziesii (D.D. Keck) Cronquist – Menzies' penstemon
- P. davidsonii var. praeteritus Cronquist – timberline beardtongue
References
[edit]- ^ "Davidson's beardtongue". John Davidson — The Legacy of a Canadian Botanist. UBC Botanical Garden and Centre for Plant Research. Archived from the original on February 27, 2014. Retrieved June 21, 2014.
- ^ a b Giblin, David. "Penstemon davidsonii". WTU Image Collection. Burke Museum of Natural History and Culture. Retrieved June 21, 2014.
- ^ "Penstemon davidsonii". Native Plant Information Network. Lady Bird Johnson Wildflower Center. Retrieved June 21, 2014.
- ^ "Penstemon - Dasanthera Group". North American Rock Garden Society. Retrieved June 21, 2014.
- ^ Morgenson, Dana C. (1975). Yosemite Wildflower Trails. Yosemite Association. p. 72. ISBN 978-0-939666-27-0.
- ^ Wiese, Karen (2000). Sierra Nevada wildflowers. Helena, Montana: Falcon. p. 43. ISBN 978-1-56044-981-2. Retrieved 4 April 2024.
- ^ Horn, Elizabeth L. (1972). Wildflowers 1 : The Cascades. Beaverton, Oregon: The Touchstone Press. p. 144. Retrieved 4 April 2024.
- ^ Roberts, Rhoda N.; Nelson, Ruth Ashton (1967). Mountain Wild Flowers of Colorado and Adjacent Areas. Denver, Colorado: Denver Museum of Natural History. p. 42. Retrieved 3 April 2024.
- ^ "Penstemon davidsonii (Davidson's penstemon)". PLANTS Database. Natural Resources Conservation Service, U.S. Department of Agriculture. Retrieved June 21, 2014.
External links
[edit]
Media related to Penstemon davidsonii at Wikimedia Commons
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