@article {20260, title = {Studies of American spermatophytes - II}, journal = { Contributions from the University of Michigan Herbarium}, volume = {7}, year = {1942}, pages = {3-54}, chapter = {3}, url = {http://www.biodiversitylibrary.org/item/46239$\#$page/7/mode/1up}, author = {Lundell, Cyrus L.} } @article {20260, title = {Studies of American spermatophytes - I}, journal = { Contributions from the University of Michigan Herbarium}, volume = {6}, year = {1941}, pages = {3-64}, chapter = {3}, url = {http://www.biodiversitylibrary.org/item/46656$\#$page/7/mode/1up}, author = {Lundell, Cyrus L.} } @article {20255, title = {Plants of Mexico and Central America - I}, journal = {Wrightia}, volume = {1}, year = {1946}, month = {04/1946}, pages = {145-160}, chapter = {145}, url = {http://www.biodiversitylibrary.org/item/15463$\#$page/164/mode/1up}, author = {Lundell, Cyrus L.} }