Published in The Wilson Bulletin, in 1989, in volume 101, issue 4, pages 579-590

Created: 2016-12-04, modified: 2016-12-04

Published in The Wilson Bulletin, in 1985, in volume 97, issue 4, pages 486-501

Created: 2016-12-04, modified: 2016-12-04

Published in Botanical Gazette, in 1918, in volume 65, issue 6, pages 526-534

Created: 2017-03-14, modified: 2017-03-14

Published in American Fern Journal, in 1995, in volume 85, pages 29-35

Created: 2017-04-23, modified: 2017-04-23