Eriogonum sphaerocephalum is a species of wild buckwheat known by the common names rock buckwheat and round-headed desert buckwheat. It is native to the western United States.
Eriogonum sphaerocephalum can be found primarily east of the crest of the Cascade Range, in Washington and Oregon to Idaho and from southern Oregon and northern California to northern Nevada. It is a common member of desert, rocky and sagebrush steppe habitats. It is found over a wide range of elevations, but is most common between .
The plant is a small shrub or subshrub up to tall and wide, growing from a caudex and producing erect flowering stems. Fresh blooms occur in early summer. The leaves are wooly (typically on the underside), widely lance-shaped to somewhat oval, and long, forming basal rosettes around the caudex and appearing at the end of branches.
The inflorescence arises on a stalk and bears many yellow flowers in a head-like cluster or umbel.
There are several varieties of this species: