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Published in Entomologist's Record and Journal of Variation, in 1987, in volume 99, issue 5-6, pages 132

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Published in Proceedings of the California Acadademy of Sciences, in 1921, in volume 11, pages 197-344

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Published in Biol Bull, in 1990, in volume 178, pages 144-159

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Published in Rhodora, in 1946, in volume 48, issue 573, pages 263-264

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Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 114-115

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Published in Entomologische Zeitung Stettin, in 1878, in volume 39, pages 475-485

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Published in Rhodora, in 1933, in volume 35, issue 412, pages 118-119

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Published in The Auk, in 1886, in volume 3, pages 60-73

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Published in The Auk, in 1886, in volume 3, pages 289-307

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Published in Rhodora, in 1942, in volume 44, issue 528, pages 453-456

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Published in Annals of the Missouri Botanical Garden, in 1988, in volume 75, pages 874-885

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Published in Proceedings of The American Philosophical Society, in 1906, in volume 45, issue 184, pages 268-270

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Published in Annals of the Missouri Botanical Garden, in 1944, in volume 31, pages 301-315

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Published in Torreya, in 1928, in volume 28, issue 5, pages 89-92

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Published in Entomologische Zeitung Stettin, in 1874, in volume 35, pages 285-287

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Published in Torreya, in 1929, in volume 29, issue 4, pages 104-107

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Published in The Auk, in 1915, in volume 32, pages 251

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Published in Annals And Magazine of Natural History, in 1889, in volume 4, pages 420-425

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Published in Rhodora, in 1967, in volume 69, issue 777, pages 55-58

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Published in Rhodora, in 1941, in volume 43, issue 506, pages 71

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Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 35-37

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Published in The Auk, in 1914, in volume 31, pages 408

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Published in Rhodora, in 1935, in volume 37, issue 434, pages 58-59

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Published in American Fern Journal, in 1976, in volume 66, pages 33-38

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Published in Biol Bull, in 1963, in volume 124, pages 262-267

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Published in Records of the Australian Museum, in 1899, in volume 3, pages 104-105

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Published in Carnivorous plant newsletter, in 1973, in volume 2, issue 3, pages 37-39

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Published in Rhodora, in 1964, in volume 66, issue 766, pages 163-164

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Published in American Fern Journal, in 1925, in volume 15, pages 1-7

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Published in American Fern Journal, in 1928, in volume 18, pages 61-63

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Published in American Fern Journal, in 1966, in volume 56, pages 182-183

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