Verbatim text: Wagner, F. S. 1993. Chromosomes of North American grapeferns and moonworts (Ophioglossaceae: Botrychium). Contr. Univ. Michigan Herb. 19: 83--92.
Author: Wagner, F.S.
Year: 1993
Title: Chromosomes of North American grapeferns and moonworts (Ophioglossaceae: Botrychium)
Journal: Contr. Univ. Michigan Herb
Volume: 19
Pages: 83–92