TY - JOUR T1 - Studies of American spermatophytes - I JF - Contributions from the University of Michigan Herbarium Y1 - 1941 A1 - Lundell, Cyrus L. SP - 3 EP - 64 VL - 6 UR - http://www.biodiversitylibrary.org/item/46656#page/7/mode/1up ER -