Published in American Fern Journal, in 1987, in volume 77, pages 28-32

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

Published in Sida, Contributions To Botany, in 1988, in volume 13, issue 1, pages 121

Created: 2015-12-02, modified: 2015-12-02

Published in Journal of South African Botany, in 1980, in volume 46, issue 2, pages 167-171

Created: 2024-09-05, modified: 2024-09-05

Published in Biol Bull, in 1933, in volume 64, pages 183-205

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