@article {3758,
	title = {Agropyron tenerum and its allies},
	journal = {Bulletin of the Torrey Botanical Club},
	volume = {32},
	number = {10},
	year = {1905},
	pages = {543-547},
	isbn = {0040-9618},
	author = {Piper, C.V.}
}
@article {3749,
	title = {Studies on the Rocky Mountain flora -- XIX},
	journal = {Bulletin of the Torrey Botanical Club},
	volume = {36},
	year = {1909},
	pages = {531-541},
	author = {Rydberg, P.A.}
}
