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
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.
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]
P. davidsonii var. praeteritus Cronquist – timberline beardtongue
References
^"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.
^ abGiblin, 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.