Geranium caespitosum is a common species, often found along trails through wooded areas of the west. The reddish, short-hairy stems bear relatively large leaves at intervals, and bright pink to light purple flowers at the top, about 1.5 inches across. They consist of five elliptic to obovate petals, with a few darker veins running lengthwise, below and between which are five greenish-pink sepals, terminating in a short spike (acuminate). The lower portion of the petals have a partial covering of long, straggly white hairs. When the flower is fully open the petals bend back below the plane, and the ten stamens at the center also curve downwards.
Leaves are divided into lobes, but not quite to the same extent as the similar
geranium viscosissimum.