@article {20249,
	title = {Studies of American plants - XVI},
	journal = {Wrightia},
	volume = {6},
	year = {1978},
	month = {02/1978},
	pages = {4-20},
	chapter = {4},
	url = {http://www.biodiversitylibrary.org/item/15468$\#$page/15/mode/1up},
	author = {Lundell, Cyrus L.}
}
@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 {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.}
}
