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Shrubby Reed-mustard
Hesperidanthus suffrutescens
NatureServe conservation status
Global (G-rank): G1
State (S-rank): S1
External links
Phenology
Flowers from May through July.
Species range
Endemic to the Green River Formation, Uinta Basin of eastern Utah.
Threats or limiting factors
The inheriently small distribution (Uinta Basin area of Utah) and population size (estimated to be a little more than 3,000 individuals) of shrubby reed-mustard may increase the species’ vulnerability to threats (USFWS 2019). Threatened by habitat destruction associated with energy exploration and development, building stone collection, mining, off-road vehicle use, and grazing (Holmgren et al. 2005). The Uinta Basin is an area of intense oil and gas exploration; the development of both tar sands and oil shale are of interest (Franklin 2005). Observations in Utah Rare Plant Database report threats from feral horses (URPD, 2025).
