Published in American Fern Journal, in 1991, in volume 81, pages 1-6

Published in American Fern Journal, in 1991, in volume 81, pages 7-23

Published in American Fern Journal, in 1991, in volume 81, pages 24-36

Published in American Fern Journal, in 1991, in volume 81, pages 37-43

Published in American Fern Journal, in 1991, in volume 81, pages 44-62

Published in American Fern Journal, in 1991, in volume 81, pages 63-67

Published in American Fern Journal, in 1991, in volume 81, pages 69-75

Published in American Fern Journal, in 1991, in volume 81, pages 75

Published in American Fern Journal, in 1991, in volume 81, pages 76-88

Published in American Fern Journal, in 1991, in volume 81, pages 89-94

Published in American Fern Journal, in 1991, in volume 81, pages 95-98

Published in American Fern Journal, in 1991, in volume 81, pages 99-102

Published in American Fern Journal, in 1991, in volume 81, pages 108

Published in American Fern Journal, in 1991, in volume 81, pages 109-118

Published in American Fern Journal, in 1991, in volume 81, pages 119-127

Published in American Fern Journal, in 1991, in volume 81, pages 128-133

Published in American Fern Journal, in 1991, in volume 81, pages 134-138

Published in American Fern Journal, in 1991, in volume 81, pages 139-140

Published in American Fern Journal, in 1991, in volume 81, pages 141