Published in Journal of The Washington Academy of Sciences, in 1922, in volume 12, issue 20, pages 454-460

Created: 2015-03-16, modified: 2015-03-16

Published in Torreya, in 1903, in volume 3, issue 12, pages 184-185

Created: 2022-12-15, modified: 2022-12-15

Published in Proceedings of The Biological Society of Washington, in 1921, in volume 34, pages 111-113

Created: 2011-07-31, modified: 2011-07-31

Published in Journal of The Washington Academy of Sciences, in 1924, in volume 14, issue 6, pages 139-145

Created: 2015-03-16, modified: 2015-03-16

Published in Proceedings of The Biological Society of Washington, in 1905, in volume 18, pages 231-232

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1906, in volume 19, pages 23-24

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1917, in volume 30, pages 179-184

Created: 2011-07-31, modified: 2021-04-05

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 111-112

Created: 2011-07-31, modified: 2021-04-05

Published in Proceedings of The Biological Society of Washington, in 1923, in volume 36, pages 49-50

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1924, in volume 37, pages 63-64

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1933, in volume 46, pages 157-158

Created: 2011-07-31, modified: 2011-07-31

Published in Journal of The Washington Academy of Sciences, in 1924, in volume 14, issue 9, pages 195-199

Created: 2015-03-16, modified: 2015-03-16

Published in Proceedings of The Biological Society of Washington, in 1905, in volume 18, pages 205-206

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1905, in volume 18, pages 215-216

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1933, in volume 46, pages 159-160

Created: 2011-07-31, modified: 2011-07-31

Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 316-317

Created: 2015-03-16, modified: 2015-03-16

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 171-172

Created: 2011-07-31, modified: 2011-07-31

Published in American Fern Journal, in 1928, in volume 18, pages 94-95

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

Published in Proceedings of The Biological Society of Washington, in 1924, in volume 37, pages 97-104

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1935, in volume 48, pages 115-117

Created: 2011-07-31, modified: 2011-07-31

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, issue 12, pages 549-557

Created: 2015-03-16, modified: 2015-03-16

Published in Rhodora, in 1918, in volume 20, issue 229, pages 19-20

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

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 199-200

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1930, in volume 43, pages 167-178

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1919, in volume 32, pages 125-126

Created: 2011-07-31, modified: 2021-04-05

Published in Proceedings of The Biological Society of Washington, in 1922, in volume 35, pages 47-51

Created: 2011-07-31, modified: 2021-04-05

Published in Journal of The Washington Academy of Sciences, in 1944, in volume 34, issue 2, pages 46-49

Created: 2015-03-16, modified: 2015-03-16

Published in American Fern Journal, in 1915, in volume 5, pages 1-4

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

Published in American Fern Journal, in 1917, in volume 7, pages 104-106

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

Published in American Fern Journal, in 1919, in volume 9, pages 1-5

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

Published in American Fern Journal, in 1919, in volume 9, pages 67-73

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

Published in American Fern Journal, in 1925, in volume 15, pages 16-19

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

Published in American Fern Journal, in 1925, in volume 15, pages 54-57

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

Published in American Fern Journal, in 1928, in volume 18, pages 1-6

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

Published in American Fern Journal, in 1928, in volume 18, pages 46-51

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

Published in American Fern Journal, in 1931, in volume 21, pages 136-139

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

Published in American Fern Journal, in 1962, in volume 52, pages 110

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

Published in Botanical Gazette, in 1905, in volume 39, issue 5, pages 366-369

Created: 2017-03-14, modified: 2017-03-14

Published in Proceedings of The Biological Society of Washington, in 1905, in volume 18, pages 239-240

Created: 2011-07-31, modified: 2011-07-31

Published in Journal of The Arnold Arboretum, in 1946, in volume 27, issue 4, pages 438-441

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

Published in American Fern Journal, in 1917, in volume 7, pages 106-109

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

Published in American Fern Journal, in 1919, in volume 9, pages 38-48

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

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 139-151

Created: 2011-07-31, modified: 2011-07-31

Published in Proceedings of The Biological Society of Washington, in 1937, in volume 50, pages 179-180

Created: 2011-07-31, modified: 2011-07-31

Published in American Fern Journal, in 1915, in volume 5, pages 4-7

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

Published in American Fern Journal, in 1913, in volume 3, pages 109-116

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

Published in American Fern Journal, in 1915, in volume 5, pages 50-52

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

Published in American Fern Journal, in 1946, in volume 36, issue 3, pages 91

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

Published in Proceedings of The Biological Society of Washington, in 1901, in volume 14, pages 161-163

Created: 2011-07-31, modified: 2011-07-31

Published in Botanical Gazette, in 1900, in volume 30, issue 6, pages 410-415

Created: 2017-03-14, modified: 2017-03-14