Verbatim text: Haufler, C. H. and Wang Z. R. 1991. Chromosomal analyses and the origin of allopolyploid Polypodium virginianum. Amer. J. Bot. 78: 624--629.
Author: Haufler, C.H., R, Wang Z.
Year: 1991
Title: Chromosomal analyses and the origin of allopolyploid Polypodium virginianum
Journal: Amer. J. Bot
Volume: 78
Pages: 624–629