CPC Plant Profile: Graham's Beardtongue
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Plant Profile

Graham's Beardtongue (Penstemon grahamii)

Penstemon grahamii-Flowering Photo Credit: Amber Swanson
Description
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Plantaginaceae
  • State: CO, UT
  • Nature Serve ID: 151543
  • Date Inducted in National Collection: 03/08/1989

Grahams beardtongue (Penstemon grahamii) is a herbaceous perennial. When in flower plants are easily sited. The colors of the flowers are brilliant lavender to pink and the tubular flower is long compared to other penstemon species. The flowers (3-20) are usually tightly arranged around the raceme pointing upward. There are 1 to 3 stems extending from the taproot, the stems are 7-18 cm long. Recently this Uintah Basin plant has become an interest and focus of research. The extent of the population is being reviewed and will be determined with the efforts of surveys conducted in the field.

Participating Institutions
Updates
  • 09/23/2020
  • Reproductive Research

Annual monitoring is conducted during the peak flowering season (May-June). Research includes collecting demographic data, pollination study, and survey to determine the extent of the population

  • 09/23/2020
  • Demographic Research

Annual monitoring is conducted during the peak flowering season (May-June). Research includes collecting demographic data, pollination study, and survey to determine the extent of the population.

Nature Serve Biotics
  • 05/02/2017

Infrequent to occasional in generally small, isolated colonies across the southern margin of the Uinta Basin of northeastern Utah (primarily Uintah County but barely extending into Carbon and Duchesne counties) and adjacent Rio Blanco County, Colorado. One site is protected on Bureau of Land Management land in Colorado; no Utah sites are protected. All the known occurrences are on oil-rich substrates and are potentially threatened by energy exploration and development. Many of the occurrences have not been visited in over 20 years.

Wendy Yates
  • 01/01/2010

Threats to the plant include loss of habitat due to oil and gas exploration, drilling and field development; and tar sand and oil shale mining. Off-road vehicle use, overuse by domestic and wild grazers, and overuse for horticultural use may also affect s

Wendy Yates
  • 01/01/2010

Survey work is currently being conducted; this information will provide the number of Penstemon grahamii left.

Wendy Yates
  • 01/01/2010

Annual monitoring is conducted during the peak flowering season (May-June). Research includes collecting demographic data, pollination study, and survey to determine the extent of the population.

Wendy Yates
  • 01/01/2010

Penstemon grahamii occurs on both private and BLM land. The BLM has managed and funded the research for this species

Wendy Yates
  • 01/01/2010

Monitoring efforts should continue. This information will provide a better understanding of this plant. A seed bank study should be conducted to provide information such as seed bank density and viability.

Wendy Yates
  • 01/01/2010

Propagation of Penstemon grahamii would be a positive approach for the protection and longevity of this plant.

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Photos
Nomenclature
Taxon Penstemon grahamii
Authority Keck
Family Plantaginaceae
CPC Number 3239
ITIS 33698
USDA PEGR6
Common Names Graham Beardtongue | Uinta Basin beardtongue | Graham's beardtongue
Associated Scientific Names Penstemon grahamii
Distribution The plant occurs along of a narrow band in Carbon, Duchesne and Uintah Counties UT (a band ~ 80 mi. long by 5 mi. wide).
State Rank
State State Rank
Colorado S1
Utah S2
Habitat

Penstemon grahamii occur on barren knolls of white calcareous shale (Green River Formation). The elevation where plants have been found is (1430-2060 m). Penstemon grahamii ocurrs in piyon-Juniper comunities. Plants favor south facing slopes, however they are also found on north facing slopes. Clusters of plants are found on ledges and drainages.

Ecological Relationships

Pollination studies have been conducted and data shows that open pollination is the most favorable method. The pollinator has not yet been determined however future studies will help determine the primary pollinators.

Pollinators
Common Name Name in Text Association Type Source InteractionID
Other
Potter wasps Pseudomasaris Confirmed Pollinator Link

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