Published in American Fern Journal, in 1954, in volume 44, pages 49-65

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

Published in American Fern Journal, in 1954, in volume 44, pages 129-147

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

Published in American Fern Journal, in 1954, in volume 44, pages 155-158

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

Published in American Fern Journal, in 1954, in volume 44, issue 3, pages 114

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