@article {35216,
	title = {Deutschl. Fl. (Roehling) 3, 1795},
	year = {Submitted}
}
@article {35217,
	title = {Rhodora 20: 131, 1918},
	year = {Submitted}
}
@article {35218,
	title = {Amer. Fern J. 27: 58, 1937},
	year = {Submitted}
}
@article {26211,
	title = {Sp. Pl. 2: 1061, 1753},
	year = {Submitted}
}
