Published in American Fern Journal, in 1989, in volume 79, pages 1-6

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

Published in Rhodora, in 1950, in volume 52, issue 614, pages 41-45

Created: 2014-06-16, modified: 2016-07-26

Published in American Fern Journal, in 1956, in volume 46, pages 157-158

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

Published in Rhodora, in 1956, in volume 58, issue 688, pages 79-87

Created: 2016-07-19, modified: 2016-07-19

Published in American Fern Journal, in 1966, in volume 56, pages 150-163

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

Published in Rhodora, in 1954, in volume 56, issue 661, pages 1-6

Created: 2014-06-16, modified: 2016-07-26

Published in Rhodora, in 1961, in volume 63, pages 181-193

Created: 2014-06-16, modified: 2016-07-26