Published in Memoirs Museum of Comparative Zoology Harvard, in 1940, in volume 54, issue 6, pages 417-531

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Published in Asa Gray correspondence. Senders Co-Cu, 1826-1891 (inclusive), in 1879, pages 1-2

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Published in Asa Gray correspondence. Senders Co-Cu, 1826-1891 (inclusive), pages 1-2

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Published in Madroño, in 1970, in volume 20, issue 5, pages 266-269

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Published in Psyche: A Journal of Entomology, in 1909, in volume 16, issue 2, pages 31

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Published in Psyche: A Journal of Entomology, in 1911, in volume 18, issue 1, pages 32-34

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Published in Bulletin of the Brooklyn Entomological Society, in 1924, in volume 19, pages 44-47

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Published in Psyche: A Journal of Entomology, in 1909, in volume 16, issue 5, pages 112

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Published in Psyche: A Journal of Entomology, in 1907, in volume 14, issue 6, pages 118-120

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Published in Banisteria, in 2013, in volume 41, pages 5-16

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Published in American Fern Journal, in 1993, in volume 83, pages 129-130

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Published in The Auk, in 1917, in volume 34, pages 209-210

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Published in American Fern Journal, in 2003, in volume 93, pages 76-80

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Published in Veliger, in 1965, in volume 7, pages 228-232

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Published in The Auk, in 1915, in volume 32, pages 240-241

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Published in The Auk, in 1905, in volume 22, pages 140-145

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Published in Journal of The New York Entomological Society, in 1923, in volume 31, issue 4, pages 175-181

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Published in Journal of The Washington Academy of Sciences, in 1943, in volume 33, pages 193-203

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Published in Palaeontology, in 1982, in volume 25, issue 4, pages 681-708

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Published in Journal of The Washington Academy of Sciences, in 1931, in volume 21, pages 80-86

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Published in Phytologia, in 2010, in volume 92, issue 2, pages 121-150

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Published in American Fern Journal, in 1993, in volume 83, pages 131-134

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Published in American Fern Journal, in 2007, in volume 97, pages 140-148

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Published in Palaeontology, in 1987, in volume 30, issue 2, pages 233-249

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Published in Contributions in Science (Los Angeles), in 1989, in volume 406, pages 1-21

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Published in American Fern Journal, in 2001, in volume 91, pages 1-8

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Published in American Fern Journal, in 2001, in volume 91, pages 229

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Published in The Wilson Bulletin, in 1926, in volume 38, issue 4, pages 200-201

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Published in Notes From The Leyden Museum, in 1880, in volume 2, issue 3, pages 197

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Published in Notes From The Leyden Museum, in 1880, in volume 2, issue 3, pages 198

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Published in American Fern Journal, in 2002, in volume 92, pages 23-29

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Published in American Fern Journal, in 2003, in volume 93, pages 153-154

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Published in American Fern Journal, in 2009, in volume 99, pages 1-44

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Published in Rodriguésia, in 2007, in volume 58, issue 1, pages 147-157

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Published in American Fern Journal, in 2014, in volume 104, pages 109-178

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Published in American Fern Journal, in 2014, in volume 104, pages 181-236

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Published in Bulletin of The Museum of Comparative Zoology, in 1940, in volume 87, pages 121-211

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Published in Veliger, in 1966, in volume 8, pages 226-230

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Published in Contributions in Science (Los Angeles), in 1985, in volume 362, pages 1-13

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Published in American Fern Journal, in 2008, in volume 98, pages 139-159

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Published in PHYTOLOGIA, in 1941, in volume 2, issue 2, pages 50-57

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Published in Madroño, in 1970, in volume 20, issue 7, pages 373-377

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Published in Rodriguésia, in 2007, in volume 58, issue 4, pages 847-858

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Published in American Fern Journal, in 2010, in volume 100, pages 189-194

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Published in Torreya, in 1940, in volume 40, issue 4, pages 120-124

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