, a relatively rare species, occurs over a small area of southwest Utah and northwest Arizona, where, as the common name suggests, it inhabits clayish areas in desert regions. The small flowers are formed of four round, slightly overlapping yellow petals, abut a quarter of an inch long, with a few red dots towards the base. The spherical stigma and the oblong, hairless anthers are a little shorter than the petals. Pedicels are drooping, especially in bud. The narrow, hairy yellow calyx lobes are fully reflexed, and not fused.
Stems branch a few times, at regular intervals, and they have an even covering of spreading hairs. Leaves are also hairy, especially along the edges. Leaf margins may have a few small, blunt teeth. Leaves are attached by a slender petiole.