Published in The Great Basin Naturalist, in 1984, in volume 44, pages 635-646

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Published in Rhodora, in 1978, in volume 80, pages 92-106

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Published in The Auk, in 1915, in volume 32, pages 154-166

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Published in The Wilson Bulletin, in 1936, in volume 48, issue 4, pages 284-289

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Published in Genera insectorum, in 1912, in volume 130, pages 1-109

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Published in The Auk, in 1915, in volume 32, pages 1-14

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Published in American Fern Journal, in 1950, in volume 40, pages 21-32

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Published in Phytologia, in 2007, in volume 89, issue 2, pages 129-131

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Published in American Fern Journal, in 1966, in volume 56, pages 101-107

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Published in Madroño, in 1980, in volume 27, issue 1, pages 47-48

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Published in American Fern Journal, in 1982, in volume 72, pages 65-75

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Published in Rhodora, in 1966, in volume 68, pages 121-138

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Published in Rhodora, in 1958, in volume 60, issue 720, pages 309-316

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Published in Novon, in 1993, in volume 3, pages 305

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Published in Asa Gray correspondence. Senders Be-Bo, in 1887, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1887, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1887, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1882, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1884, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1881, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1881, pages 1-2

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Published in Asa Gray correspondence. Senders Be-Bo, in 1882, pages 1-4

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Published in Asa Gray correspondence. Senders Be-Bo, in 1881, pages 1-2

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Published in American Fern Journal, in 1983, in volume 73, pages 53-62

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Published in Bonner Zoologische Beiträge, in 1955, in volume 6, pages 200-206

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Published in American Fern Journal, in 2002, in volume 92, pages 39

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Published in Madroño, in 1962, in volume 16, issue 5, pages 158-161

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Published in Contributions from the University of Michigan Herbarium, in 1999, in volume 22, pages 135-187

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Published in Spixiana, in 1981, in volume 4, pages 1-37

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Published in Annals of the Missouri Botanical Garden, in 1972, in volume 59, pages 203-217

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Published in Sida, Contributions To Botany, in 1975, in volume 6, issue 2, pages 63-66

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Published in American Fern Journal, in 1983, in volume 73, pages 1-5

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Published in Novon, in 2003, in volume 13, pages 368-375

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Published in Rhodora, in 1961, in volume 63, pages 164-175

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Published in Rhodora, in 2000, in volume 102, issue 911, pages 277

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Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 63-82

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Published in Rhodora, in 1956, in volume 58, issue 688, pages 79-87

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Published in Archiv für Naturgeschichte, in 1843, in volume 9, issue 1, pages 361-364

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Published in American Fern Journal, in 1966, in volume 56, pages 3-17

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Published in Memoirs of the Queensland Museum, in 1987, in volume 25, pages 1-44

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Published in Bonner Zoologische Beiträge, in 1953, in volume 4, pages 1-12

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Published in American Fern Journal, in 1972, in volume 62, pages 33-43

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Published in Sitzungsberichte der Akademie der Wissenschaften mathematisch-naturwissenschaftliche Klasse, in 1915, in volume 124, pages 547-565

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