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Gibben's Beardtongue
Penstemon gibbensii
NatureServe conservation status
Global (G-rank): G1G2
State (S-rank): S1
External links
Phenology
Penstemon gibbensii flowers from June to July and all the way to September with enough summer rainfall.
Species range
Penstemon gibbensii is known from fewer than 10 populations in Dagget County, Utah, Moffat and Rio counties, Colorado and from Carbon and Sweetwater counties, Wyoming.
Threats or limiting factors
Summer grazing by large native ungulates was cited as the primary threat to Penstemon gibbensii, though forage production is low and some settings are steep. Grazing exclosure studies at the Cherokee Basin site have documented an initial increase in P. gibbensii numbers since grazing has been removed. Energy exploration and development may pose a serious threat, particularly where P. gibbensii occurs on flatter terrain, including affects of seismic exploration and road development. Exotic species encroachment and trampling by OHV and humans are also threats (Fertig and Neighbours 1996, Spackman and Anderson 1999, Heidel 2009).
