Shrubby reed-mustard

Shrubby reed-mustard is much smaller than its woody-sounding name might suggest. Several leafy stems rise in a clump from a branching woody crown, and clusters of pale yellow to greenish-yellow flowers form near the stem ends. The smooth-edged leaves are arranged alternately. Those traits help introduce the plant, but they do not separate it reliably from every mustard a visitor might encounter. With a plant this rare, careful observation is the right way to settle an identification, not collecting a specimen.

The plant's geography is tied closely to geology. It occupies dry, shallow soils associated with pale shale of the Green River Formation in the Uinta Basin, within parts of Duchesne and Uintah counties. This narrow habitat is embedded in a much larger desert-shrub landscape; a broad patch of apparently similar ground is not proof that the plant occurs there. Flowering is generally in late spring to early summer, with weather and site conditions affecting the display. Keep any viewing on existing authorized routes rather than searching off-road across shale slopes.

As of October 22, 2026, it remains federally endangered under the name Schoenocrambe suffrutescens. Utah's conservation table uses Hesperidanthus suffrutescens; the different names refer to the same species here. Energy development and other surface disturbance are important concerns in its restricted habitat. Recovery documents describe conservation goals, not evidence that recovery or delisting has already occurred. We don't publish exact population locations.

Low clustered stems, alternate smooth-edged leaves, pale yellow to greenish-yellow flowers.

Stay on existing authorized routes; do not drive or walk through apparently bare shale to seek plants.