by University of Arizona. Agricultural Experiment Station

1898

by University of Arizona. Agricultural Experiment Station

1922

by University of Minnesota. Dept. of Botany

1927

by University of Minnesota. Department of Botany

1925

by Washington State University

1916

by University of California (System)

1971

by University of Arizona. Agricultural Experiment Station

1926

by University of California, Berkeley

1893

by University of California. Secretary

1893

by University of Chicago

1908

by University of Chicago

1927

by Cambridge University Library

1911