@article {20249,
	title = {Studies of American plants - VII},
	journal = {Wrightia},
	volume = {5},
	year = {1974},
	month = {11/1974},
	pages = {51-72},
	chapter = {51},
	url = {http://www.biodiversitylibrary.org/item/15467$\#$page/57/mode/1up},
	author = {Lundell, Cyrus L.}
}
@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.}
}
