A natural hybrid of Polystichum lonchitis and P. acrostichoides from the Bruce Peninsula
Wagner, Warren H. (Warren Herbert), 1920-2000 Hagenah, Dale J
Article
1954
Rhodora
56
1--6
BioStor
[Cambridge, Mass., etc.] New England Botanical Club [etc.]
BioStor: https://biostor.org/reference/138201