Penstemon acaulis

Plant Information

Species:

acaulis

Species Authority:

L.O. Williams

Subgenus:

Penstemon

Section:

Ericopsis

Subsection:

Caespitosi

Habit:

herbaceous perennial

Habit Woodiness:

suffrutescent

Lifespan:

long-lived

Habitat Description:

Dry ridgetops in sandstone-derived soils with sagebrush and Utah juniper. Endemic to a small area from McKinnon (Sweetwater Co., Wyo.) to 15 mi s. of Manila (Daggett Co., Utah).

Distribution Range:

Endemic to a small area from McKinnon (Sweetwater County, Wyoming) to 15 mi south of Manila (Daggett County, Utah).

Soil Type:

Sandstone-derived soils

Elevation - Min:

1500.00m

Elevation - Max:

2200.00m

Common Name:

Stemless Beardtongue

Other Notes:

"The next of kin to P. acualis is P. yampaensis Penl., and together they may be the most peculiar of all penstemons. Penstemon yampaensis grows in calcareous soils in Moffat Co., Colorado in the vicinity of Greystone, just east of Dinosaur National Mounument. These acaulescent penstemons may be closely allied to P. laricifolius Hook. & Arn. of Wyoming and northern Colorado. Penland (Madrono 14: 156-160. 1958) made a comparative study on the pubescence, leaf venation, and corolla shape of P. acaulis and P. yampaensis and concluded that they are more closely alliedto section Cristati (Aurator), through such species as P. dolius, P. pumilus, and P. moffatii, than to section Caespitosi (Ericopsis) where Keck (Bull. torrey Bot. Club 64: 366. 1937) placed P. acaulis." - Holmgren 1984

First Bloom:

June

Last Bloom:

June

References:

Holmgren NH. 1984. Penstemon and Keckiella. In Intermountain Flora, vol. 4. Ed. Arthur Cronquist et al. Bronx: The New York Botanical Garden.