Published in Nemouria, in 1970, in volume 1, pages 1-14
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Published in Novon, in 1998, in volume 8, pages 133-136
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Published in Phytoneuron, in 2014, in volume 2014-42, pages 1-6
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Published in American Fern Journal, in 2011, in volume 101, pages 6-11
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Published in Madroño, in 1986, in volume 33, issue 2, pages 111-122
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Published in Annals of the Missouri Botanical Garden, in 1992, in volume 79, pages 730-736
Created: 2010-01-08, modified: 2015-12-16
Published in Novon, in 1994, in volume 4, pages 324-329
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Published in The Great Basin Naturalist, in 1990, in volume 50, issue 3, pages 295-298
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Published in The Auk, in 1912, in volume 29, pages 267
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Published in The Great Basin Naturalist, in 1984, in volume 44, pages 272-276
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Published in Phytologia, in 2018, in volume 100, issue 1, pages 27-36
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Published in American Fern Journal, in 2005, in volume 95, pages 22-29
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Published in Rhodora, in 1934, in volume 36, issue 430, pages 372-375
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Published in Madroño, in 2006, in volume 53, pages 412
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Published in Madroño, in 2007, in volume 54, pages 372
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Published in Bulletin of The African Bird Club, in 2009, in volume 16, issue 2, pages 211-212
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Published in Great Basin Naturalist Memoirs, in 1986, in volume 8, pages 135-140
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Published in The Wilson Bulletin, in 1951, in volume 63, issue 1, pages 59-60
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Published in Telopea, in 2019, in volume 22, pages 61-66
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Published in American Fern Journal, in 2003, in volume 93, pages 20-24
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Published in American Fern Journal, in 2008, in volume 98, pages 47-48
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Published in The Auk, in 1898, in volume 15, pages 284-285
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Published in The Wilson Bulletin, in 1962, in volume 74, issue 2, pages 193-196
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Published in The Great Basin Naturalist, in 1946, in volume 7, pages 29
Created: 2017-11-16, modified: 2017-11-16
Published in American Fern Journal, in 2003, in volume 93, pages 137-145
Created: 2017-04-23, modified: 2017-04-23
Published in Botanical Gazette, in 1915, in volume 60, issue 1, pages 55-65
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Published in Botanical Gazette, in 1921, in volume 71, issue 1, pages 32-60
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Published in The Wilson Bulletin, in 1943, in volume 55, issue 3, pages 164-177
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Published in Torreya, in 1925, in volume 25, issue 1, pages 15-16
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Published in Journal of Raptor Research, in 1995, in volume 29, issue 2, pages 110-116
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Published in Biol Bull, in 1963, in volume 124, pages 163-169
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Published in Palaeontology, in 1965, in volume 8, issue 1, pages 82-106
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Published in Western Australian Naturalist, in 1964, in volume 9, issue 4, pages 90-91
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Published in Annals of the Entomological Society of America, in 1910, in volume 3, issue 3, pages 186-203
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Published in American Fern Journal, in 2007, in volume 97, pages 230-233
Created: 2017-04-23, modified: 2017-04-23
Published in American Fern Journal, in 2010, in volume 100, pages 27-31
Created: 2017-04-23, modified: 2017-04-23
Published in The Wilson Bulletin, in 1949, in volume 61, issue 1, pages 52-54
Created: 2016-12-04, modified: 2016-12-04
Published in The Wilson Bulletin, in 1949, in volume 61, issue 2, pages 117-119
Created: 2016-12-04, modified: 2016-12-04
Published in Palaeontology, in 1959, in volume 1, issue 4, pages 292-297
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Published in Palaeontology, in 1961, in volume 4, issue 1, pages 71-81
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Published in Biol Bull, in 1943, in volume 85, pages 201-222
Created: 2010-01-06, modified: 2011-06-21
Published in Bulletin of The British Ornithologists' Club, in 2002, in volume 122, issue 3, pages 180-185
Created: 2015-08-11, modified: 2015-08-11
Published in Great Basin Naturalist Memoirs, in 1986, in volume 8, pages 94-98
Created: 2017-11-16, modified: 2017-11-16
Published in Biol Bull, in 1965, in volume 128, pages 67-76
Created: 2010-01-06, modified: 2011-06-21
Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 136-137
Created: 2014-01-30, modified: 2014-01-30
Published in American Fern Journal, in 1995, in volume 85, pages 89-94
Created: 2017-04-23, modified: 2017-04-23
Published in American Fern Journal, in 2006, in volume 96, pages 54-61
Created: 2017-04-23, modified: 2017-04-23
Published in Palaeontology, in 1998, in volume 41, issue 6, pages 1183-1194
Created: 2016-04-22, modified: 2016-04-22
Published in The Auk, in 1895, in volume 12, pages 173-174
Created: 2013-03-08, modified: 2013-03-08
Published in Nautilis, in 1890, in volume 4, pages 20-22
Created: 2013-09-28, modified: 2013-09-28