Eriogonum umbellatum
 Eriogonum umbellatum is a species of wild buckwheat known by the common name sulphurflower buckwheat or simply sulphur flower. It is native to western North America from California to Colorado to central Canada where it is abundant and found in many habitats. This is an extremely variable plant and hard to identify because individuals can look very different from one another. Also there are a great many varieties.