Steere, Holmen & Mogensen, Bryophyta Arct. Exs.
Steere, W.C.; Holmen, K.A.; Mogensen, G.S. [51 - 100]

Academy of Natural Sciences of Drexel University
Catalog #: PH00119750
K. A. Holmen #s.n. 10 July 1960
Catoscopium nigritum (Hedw.) Brid.
USA, Alaska, Utukok River, Driftwood Creek