Notes on Eriogonum

Abstract

Three species of Eriogonumn have been referred to both that genus and to Oxytheca for more than half a century. In studying the genus Oxytheca, it became desirable to look critically at these species. All three species are considered to be Eriogonums for reasons that will be pointed out later. Distribution data are presented as completely as practicable, and one new variety is described. The number of collections examined is given, as well as the average flowering time. A specimen is cited for each county from which a collection was seen. At the end of the paper there is a complete list of specimens examitied. The curators of the following herbaria are cordially thanked for their generosity in lending specimens: California Academy of Sciences, University of California (including the Clokey Herbarium), Gray, Missouri Botanical Garden, New York Botanical Garden, Acidemy of Natural Sciences of Philadelphia, Pomona College, and United States National Herbarium.