Synonym: Coldenia nuttallii
Rosette tiquilia is a taprooted annual wildflower with prostrate stems with long, dichotomously branched stems spreading across the ground. Clusters of leaves and flowers arise at the ends of the stems as well as at locations along the stem where the branches arise. The rosettes that are formed may become as much as 30-40 cm across. The herbage consists of coarse stiff hairs, or the inflorescence may have stiff bristles on the calyx and petioles and margins of the subtending leaves. The leaves are petiolate with blades that are elliptic, ovate or subrotund in outline, measuring from 3-9 mm long and 2-7 mm wide. One to three pairs of lateral veins arise from the midvein and are impressed on the upper surface of the blade.
The flowers are clustered in the leaf axils. The calyx is 2-3 mm long in flower, elongating up to 4.5 mm in fruit. The calyx lobes are narrowly triangular, tapering gradually to a point. The narrowly bell-shaped tube of the flower is 2.5-4 mm long with spreading lobes from 0.5-1 mm long. The flowers are pink or lavender.
Rosette tiquilia is typically found in dry sandy soils of the desert basins of the west.
Rosette tiquilia may be found to the east of the the Cascade Mts. from central Washington south to southern California and east to the Snake River Plains of southern Idaho and across much of Nevada to the western part of Utah, the Uinta Basin of Utah, and northern Arizona.