Gucker, C.L.; Shaw, N.L. 2019. Sulphur-flower buckwheat (Eriogonum umbellatum). In: Gucker, C.L.; Shaw, N.L., eds. Western forbs: Biology, ecology, and use in restoration. Reno, NV: Great Basin Fire Science Exchange. Online:https://westernforbs.org/species/sulphur-flower-buckwheat-eriogonum-umbellatum/