National Museum of Natural History (U.S.). Division of Cryptogams.

The Division of Cryptogams was created at the time of the establishment of the Department of Botany in 1947. Around 1991, the Division ceased to be an administrative entity in the Department of Botany.

Curators and research staff of the Division of Cryptogams included Ellsworth Paine Killip, Acting Curator, 1947-1950; Paul S. Conger, Associate Curator and Botanist Emeritus, 1947-1979; George Albert Llano, AssociateCurator, 1947-1951; Conrad Vernon Morton, Acting Curator, 1950-1959; Mason E. Hale, Associate Curator, Curator, and Senior Botanist, 1957-1990; Robert R. Ireland, Assistant Curator, 1958-1961; Richard E. Norris, Associate Curator, 1962-1964; Harold Ernest Robinson, Associate Curator and Curator, 1962-1991; Elmer Yale Dawson, Curator, 1965-1966; Arthur L. Dahl, Associate Curator, 1970-1974; James N. Norris, Associate Curator, 1975-1991; Mark M. Littler, Curator and Senior Botanist, 1982-1991; Maria A. Faust, Associate Curator, 1989-1991; Jeanine L. Olsen, Associate Curator, 1989-1991; and Elizabeth A. Zimmer, 1990-1991.