Published in Contributions in Science, in 1989, in volume 402, pages 1-43

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Published in The Wilson Bulletin, in 1970, in volume 82, issue 1, pages 14-28

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Published in The Wilson Bulletin, in 1973, in volume 85, issue 2, pages 197-208

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Published in Asa Gray correspondence. Senders A, in 1889, pages 1

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Published in Rhodora, in 2003, in volume 105, issue 921, pages 92-93

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Published in Botanical Gazette, in 1887, in volume 12, issue 8, pages 192

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Published in Palaeontology, in 1964, in volume 7, issue 1, pages 85-104

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Published in Rhodora, in 1940, in volume 42, issue 500, pages 280

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Published in Botanical Gazette, in 1892, in volume 17, issue 3, pages 78-81

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Published in Rhodora, in 1934, in volume 36, issue 429, pages 344-346

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Published in Rhodora, in 1932, in volume 34, issue 397, pages 1-4

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Published in Botanical Gazette, in 1887, in volume 12, issue 3, pages 65-66

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Published in Madroño, in 1970, in volume 20, issue 5, pages 288

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Published in Novon, in 2006, in volume 16, pages 168-204

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Published in American Fern Journal, in 1931, in volume 21, pages 11-20

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Published in American Fern Journal, in 1931, in volume 21, pages 64-71

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Published in Botanical Gazette, in 1889, in volume 14, issue 7, pages 180-181

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Published in Botanical Gazette, in 1890, in volume 15, issue 11, pages 299-304

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Published in The Wilson Bulletin, in 1902, in volume 14, issue 1, pages 5-7

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Published in Palaeontology, in 1964, in volume 7, issue 1, pages 72-84

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Published in Journal of The Arnold Arboretum, in 1934, in volume 15, issue 1, pages 28-42

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Published in Botanical Gazette, in 1891, in volume 16, issue 2, pages 45-49

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Published in The Wilson Bulletin, in 1901, in volume 13, issue 4, pages 37-38

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Published in The Wilson Bulletin, in 1902, in volume 14, issue 4, pages 113-116

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Published in Torreya, in 1936, in volume 36, issue 6, pages 150-156

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Published in The Wilson Bulletin, in 1899, in volume 11, issue 4, pages 84

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Published in The Wilson Bulletin, in 1899, in volume 11, issue 4, pages 86

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Published in The Wilson Bulletin, in 1900, in volume 12, issue 3, pages 2-4

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Published in Palaeontology, in 1983, in volume 26, issue 1, pages 147-173

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Published in Torreya, in 1939, in volume 39, issue 1, pages 18-24

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Published in The Auk, in 1905, in volume 22, pages 214

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Published in The Wilson Bulletin, in 1938, in volume 50, issue 4, pages 254-256

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Published in Revue Suisse De Zoologie, in 1971, in volume 78, pages 807-814

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Published in Asa Gray correspondence. Senders A, in 1837, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1837, pages 1-3

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Published in Rhodora, in 1998, in volume 100, issue 901, pages 1-24

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Published in Sida, Contributions To Botany, in 1993, in volume 15, pages 619-622

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Published in Phytoneuron, in 2013, in volume 2013-35, pages 1-3

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Published in Münchner Koleopterologische Zeitschrift, in 1903, in volume 1, pages 117-150

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Published in Entomological News, in 1981, in volume 92, pages 69-74

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Published in Asa Gray correspondence. Senders A, in 1864, pages 1

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Published in Asa Gray correspondence. Senders A, in 1866, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1873, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1876, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1877, pages 1-4

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Published in Asa Gray correspondence. Senders A, in 1873, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1875, pages 1-2

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Published in The Wilson Bulletin, in 1901, in volume 13, issue 4, pages 29-30

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Published in Phytologia, in 2010, in volume 92, issue 2, pages 241-248

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Published in The Wilson Bulletin, in 1898, in volume 10, issue 4, pages 65-66

Created: 2016-11-27, modified: 2016-11-27