Published in Rhodora, in 1921, in volume 23, issue 270, pages 126-127

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Published in Rhodora, in 1933, in volume 35, issue 415, pages 227-230

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Published in Palaeontology, in 1967, in volume 10, issue 2, pages 314-316

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Published in Bulletin of The British Ornithologists' Club, in 2001, in volume 121, issue 1, pages 10-23

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Published in Rhodora, in 1930, in volume 32, issue 379, pages 140-142

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Published in Rhodora, in 1923, in volume 25, issue 299, pages 189-191

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Published in Palaeontology, in 1968, in volume 11, issue 3, pages 435-438

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Published in Rhodora, in 1926, in volume 28, issue 2, pages 31-34

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Published in Rhodora, in 1903, in volume 5, issue 57, pages 213-219

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Published in Rhodora, in 1935, in volume 37, issue 436, pages 161-162

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Published in Torreya, in 1903, in volume 3, issue 2, pages 31-32

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Published in Rhodora, in 1901, in volume 3, pages 89-90

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Published in Rhodora, in 1903, in volume 5, issue 56, pages 202

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Published in Rhodora, in 1910, in volume 12, issue 142, pages 204-205

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Published in Rhodora, in 1911, in volume 13, issue 156, pages 253

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Published in Rhodora, in 1907, in volume 9, issue 101, pages 86-90

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Published in Palaeontology, in 1958, in volume 1, issue 3, pages 207-225

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Published in Rhodora, in 1903, in volume 5, issue 50, pages 74-76

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Published in Rhodora, in 1908, in volume 10, issue 111, pages 56

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Published in Rhodora, in 1919, in volume 21, issue 248, pages 147-148

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Published in Rhodora, in 1931, in volume 33, issue 392, pages 167-170

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Published in Rhodora, in 1914, in volume 16, issue 181, pages 19-20

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Published in Rhodora, in 1916, in volume 18, issue 215, pages 239-240

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Published in American Fern Journal, in 1942, in volume 32, pages 1-12

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Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 2/3, pages 165-170

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Published in The Great Basin Naturalist, in 1977, in volume 37, pages 57-66

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Published in Forktail, in 2002, in volume 18, pages 67-86

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Published in Forktail, in 2012, in volume 28, pages 44-48

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Published in Forktail, in 2012, in volume 28, pages 129-135

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Published in Phytologia, in 1998, in volume 85, issue 4, pages 273-275

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Published in Rhodora, in 1917, in volume 19, issue 222, pages 105-110

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Published in Rhodora, in 1922, in volume 24, issue 282, pages 111-121

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Published in Bulletin of The African Bird Club, in 2010, in volume 17, issue 1, pages 99-101

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Published in Rhodora, in 1917, in volume 19, issue 223, pages 119-130

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Published in Palaeontology, in 1968, in volume 11, issue 2, pages 283-305

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Published in Nautilis, in 1927, in volume 40, pages 109-111

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Published in Torreya, in 1928, in volume 28, issue 5, pages 99-100

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Published in Forktail, in 1993, in volume 8, pages 25-52

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Published in Bulletin of The British Ornithologists' Club, in 1999, in volume 119, pages 4-15

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Published in Bulletin of The British Ornithologists' Club, in 1996, in volume 116, pages 216-224

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Published in Botanical Gazette, in 1893, in volume 18, issue 6, pages 242

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Published in Torreya, in 1908, in volume 8, issue 9, pages 218-219

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Published in Torreya, in 1908, in volume 8, issue 10, pages 233-235

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Published in Bulletin of the British Ornithologists' Club, in 2002, in volume 122, issue 2, pages 109-141

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Published in Smithsonian miscellaneous collections, in 1921, in volume 69, issue 5, pages 1-309

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Published in Torreya, in 1924, in volume 24, issue 3, pages 44-46

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Published in Torreya, in 1935, in volume 35, issue 1, pages 11-13

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