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Published in Madroño, in 1957, in volume 14, issue 1, pages 30-36
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in 1888, pages 1-2
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Published in Madroño, in 1940, in volume 5, issue 7, pages 240
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Published in The Auk, in 1887, in volume 4, pages 346
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Published in Psyche: A Journal of Entomology, in 1974, in volume 81, issue 1, pages 121-133
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Published in Madroño, in 1972, in volume 21, issue 7, pages 486
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Published in Palaeontology, in 1968, in volume 11, issue 1, pages 104-115
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Published in The Auk, in 1914, in volume 31, pages 412
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Published in Journal of The Botanical Research Institute of Texas, in 2013, in volume 7, issue 1, pages 611-612
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Published in Annals of the Missouri Botanical Garden, in 1974, in volume 61, pages 427-461
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Published in The Auk, in 1912, in volume 29, pages 543-544
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Published in Rhodora, in 1934, in volume 36, issue 430, pages 376
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Published in Sida, Contributions To Botany, in 2003, in volume 20, issue 3, pages 944
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Published in Sida, Contributions To Botany, in 2003, in volume 20, issue 3, pages 952
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Published in Bulletin of The British Ornithologists' Club, in 1968, in volume 88, pages 90-93
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Published in Journal of Raptor Research, in 1992, in volume 26, issue 1, pages 43
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Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 1-17
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Published in Great Basin Naturalist, in 1971, in volume 31, pages 256-260
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Published in Madroño, in 1939, in volume 5, issue 2, pages 75-77
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Published in Rhodora, in 1970, in volume 72, issue 791, pages 351-369
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Published in Botanical Museum Leaflets, Harvard University, in 1963, in volume 20, pages 213-219
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Published in Madroño, in 1989, in volume 36, issue 3, pages 174
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Published in Rhodora, in 1944, in volume 46, issue 545, pages 149-155
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Published in The Wilson Bulletin, in 1935, in volume 47, issue 2, pages 120-124
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Published in Rhodora, in 1940, in volume 42, issue 495, pages 57-83
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Published in Rhodora, in 1940, in volume 42, issue 498, pages 203-213
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Published in Sida, Contributions To Botany, in 2003, in volume 20, issue 4, pages 1362
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Published in American Fern Journal, in 1917, in volume 7, pages 63-66
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Published in Sida, Contributions To Botany, in 2001, in volume 19, issue 4, pages 898
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Published in Palaeontology, in 1980, in volume 23, issue 3, pages 657-666
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Published in Bulletin of The African Bird Club, in 2005, in volume 12, issue 1, pages 40-41
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Published in Psyche: A Journal of Entomology, in 1969, in volume 76, issue 3, pages 280-305
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Published in Pan-Pacific Entomologist, in 1997, in volume 73, issue 3, pages 184-185
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Published in Bothalia, in 1922, in volume 1, pages 83-86
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Published in Bothalia, in 1922, in volume 1, pages 87-96
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Published in Bothalia, in 1922, in volume 1, pages 33-38
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Published in Rhodora, in 1940, in volume 42, issue 496, pages 105-143
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Published in Rhodora, in 1940, in volume 42, issue 497, pages 158-193
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Published in Transactions of The American Microscopical Society, in 1912, in volume 31, pages 225-230
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Published in Gardens' Bulletin Singapore, in 1989, in volume 42, issue 1, pages 47-64
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Published in Botanical Gazette, in 1915, in volume 60, issue 3, pages 215-227
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doi:10.1086/331636