Published in Botanical Gazette, in 1895, in volume 20, issue 1, pages 32

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

Published in American Fern Journal, in 1931, in volume 21, pages 132-136

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Published in Botanical Gazette, in 1896, in volume 21, issue 4, pages 218-223

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

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1910, in volume 62, pages 460-463

Created: 2013-03-02, modified: 2013-03-02

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 665-675

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Published in The Auk, in 1905, in volume 22, pages 438-439

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Published in The Auk, in 1900, in volume 17, pages 314-315

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Published in The Auk, in 1915, in volume 32, pages 133-134

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Published in The Auk, in 1913, in volume 30, pages 128

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Published in The Auk, in 1897, in volume 14, pages 225-226

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Published in The Auk, in 1902, in volume 19, pages 111

Created: 2013-03-07, modified: 2013-03-08

Published in Palaeontology, in 1982, in volume 25, issue 4, pages 897-903

Created: 2016-04-23, modified: 2016-04-23

Published in The Auk, in 1918, in volume 35, pages 240-241

Created: 2013-03-08, modified: 2013-03-08

Published in Science, in 1903, in volume 17, issue 439, pages 873

Created: 2013-04-12, modified: 2013-04-12

Published in The Auk, in 1919, in volume 36, pages 591-592

Created: 2013-03-07, modified: 2013-03-08

Published in The Auk, in 1904, in volume 21, pages 309-310

Created: 2013-03-07, modified: 2013-03-08

Published in The Auk, in 1916, in volume 33, pages 322-324

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1906, in volume 23, pages 98-99

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1911, in volume 28, pages 511-512

Created: 2013-03-08, modified: 2013-03-08

Published in Palaeontology, in 1984, in volume 27, issue 4, pages 815-824

Created: 2016-04-23, modified: 2016-04-23

Published in Palaeontology, in 1974, in volume 17, issue 3, pages 507-524

Created: 2016-04-23, modified: 2016-04-23

Published in Palaeontology, in 1981, in volume 24, issue 1, pages 1-23

Created: 2016-04-23, modified: 2016-04-23

Published in The Auk, in 1901, in volume 18, pages 123-124

Created: 2013-03-07, modified: 2013-03-08

Published in The Auk, in 1906, in volume 23, pages 241-242

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1892, in volume 9, pages 308-310

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1918, in volume 35, pages 65-73

Created: 2013-03-07, modified: 2013-03-08

Published in The Auk, in 1919, in volume 36, pages 90-99

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Published in The Auk, in 1913, in volume 30, pages 582

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Published in The Auk, in 1920, in volume 37, pages 110-125

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1894, in volume 11, pages 39-45

Created: 2013-03-08, modified: 2013-03-08

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 23-24

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

Published in The Auk, in 1917, in volume 34, pages 445-452

Created: 2013-03-07, modified: 2013-03-08

Published in Proceedings of the Biological Society of Washington, in 1906, in volume 19, pages 97

Created: 2012-05-14, modified: 2012-05-14

Published in Palaeontology, in 1988, in volume 31, issue 4, pages 939-949

Created: 2016-04-23, modified: 2016-04-23

Published in The Auk, in 1912, in volume 29, pages 531-532

Created: 2013-03-08, modified: 2013-03-08

Published in Proceedings of the Biological Society of Washington, in 1898, in volume 12, pages 109-114

Created: 2009-12-21, modified: 2011-06-21

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 71-73

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

Published in The Auk, in 1899, in volume 16, pages 294-295

Created: 2013-03-07, modified: 2013-03-08

Published in The Auk, in 1917, in volume 34, pages 119-132

Created: 2013-03-08, modified: 2013-03-08

Published in Proceedings of The Biological Society of Washington, in 1901, in volume 14, pages 133-134

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

Published in Proceedings of the Biological Society of Washington, in 1928, in volume 41, pages 87-88

Created: 2017-01-27, modified: 2017-01-27

Published in Proceedings of The Biological Society of Washington, in 1897, in volume 11, pages 241-270

Created: 2011-07-31, modified: 2012-03-26

Published in Proceedings of The Biological Society of Washington, in 1897, in volume 11, pages 173-174

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

Published in Palaeontology, in 1976, in volume 19, issue 1, pages 79-93

Created: 2016-04-23, modified: 2016-04-23

Published in Palaeontology, in 1979, in volume 22, issue 1, pages 189-228

Created: 2016-04-23, modified: 2016-04-23

Published in Zoologica, in 1950, in volume 35, issue 1, pages 20

Created: 2016-11-23, modified: 2016-11-23

Published in Rhodora, in 1955, in volume 57, issue 674, pages 71-72

Created: 2014-06-16, modified: 2016-07-26

Published in Proceedings of The Biological Society of Washington, in 1926, in volume 39, pages 21-28

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

Published in The Wilson Bulletin, in 2000, in volume 112, issue 4, pages 517-523

Created: 2017-08-22, modified: 2017-08-22

Published in Palaeontology, in 1973, in volume 16, issue 3, pages 563-566

Created: 2016-04-23, modified: 2016-04-23