Anonymous, Calif. Fungi
Herbarium of the University of California. [1- ? 1425]

USDA United States National Fungus Collections
Catalog #: BPI 949032
s.n.
Usnea fragilescens Hav. ex Lynge
United States, California

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.01322
D. Don s.n.
Usnea fragilescens Hav. ex Lynge