Published in American Fern Journal, in 1985, in volume 75, pages 128-132

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

Published in Biol Bull, in 1956, in volume 110, pages 157-168

Created: 2010-01-06, modified: 2011-06-21

Published in Biol Bull, in 1957, in volume 112, pages 196-219

Created: 2010-01-06, modified: 2011-06-21

Published in Biol Bull, in 1958, in volume 115, pages 257-268

Created: 2010-01-06, modified: 2011-06-21

Published in Cryptogamie. Algologie, in 1980, in volume 1, issue 1, pages 3-17

Created: 2021-02-17, modified: 2021-02-17