Published in Botanical Museum Leaflets, Harvard University, in 1966, in volume 21, pages 229-248
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Published in Botanical Museum Leaflets, Harvard University, in 1969, in volume 22, pages 165-227
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Published in Botanical Museum Leaflets, Harvard University, in 1961, in volume 19, pages 191-194
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Published in Annals And Magazine of Natural History, in 1881, in volume 8, pages 158-159
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Published in Palaeontology, in 1969, in volume 12, issue 3, pages 400-405
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Published in Annals And Magazine of Natural History, in 1890, in volume 5, pages 119-120
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Published in Torreya, in 1927, in volume 27, issue 6, pages 97-98
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Published in Fieldiana Zoology, in 1948, in volume 31, issue 24, pages 195-200
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Published in Annals And Magazine of Natural History, in 1882, in volume 9, pages 132-133
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Published in Bull Brit Ornithol Club, in 1962, in volume 82, pages 76-77
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Published in Bull Brit Ornithol Club, in 1961, in volume 81, pages 43-45
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Published in Annals And Magazine of Natural History, in 1839, in volume 4, pages 246-253
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Published in The Auk, in 1896, in volume 13, pages 341-342
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Published in Fieldiana Zoology, in 1967, in volume 51, issue 7, pages 91-117
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Published in Entomologist's Record and Journal of Variation, in 1979, in volume 91, issue 1, pages 22-23
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Published in Bulletin of the British Ornithologists' Club, in 1970, in volume 90, issue 3, pages 78-80
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Published in Zoologica, in 1958, in volume 43, issue 5, pages 77-88
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Published in Proceedings of The United States National Museum, in 1886, in volume 9, pages 221-224
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Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 236-240
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Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 210-215
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Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 316-322
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Published in Entomologist's Record and Journal of Variation, in 1971, in volume 83, pages 101-108
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Published in Biol Bull, in 1929, in volume 56, pages 157-163
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Published in Biol Bull, in 1977, in volume 152, pages 169-181
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Published in American Fern Journal, in 2012, in volume 102, pages 91-113
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Published in Annals And Magazine of Natural History, in 1908, in volume 1, pages 228-230
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Published in Biol Bull, in 1954, in volume 107, pages 130-148
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Published in Biol Bull, in 1954, in volume 107, pages 149-155
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Published in Biol Bull, in 1956, in volume 110, pages 196-200
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Published in Biol Bull, in 1964, in volume 126, pages 307-318
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Published in Madroño, in 1977, in volume 24, issue 2, pages 68-74
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Published in Annals And Magazine of Natural History, in 1883, in volume 12, pages 133-134
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Published in Entomologist's Record and Journal of Variation, in 1991, in volume 103, issue 1-2, pages 42-43
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Published in Biol Bull, in 1955, in volume 109, pages 64-74
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Published in Biol Bull, in 1964, in volume 126, pages 253-263
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Published in Phytoneuron, in 2014, in volume 2014-41, pages 1-42
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Published in Madroño, in 1993, in volume 40, issue 3, pages 148-160
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Published in Entomologist's Record and Journal of Variation, in 1981, in volume 93, issue 3-4, pages 77-80
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Published in Journal of The East Africa Natural History Society and National Museum, in 1991, in volume 81, issue 197, pages 1-13
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Published in Entomologist's Record and Journal of Variation, in 1981, in volume 93, issue 7-8, pages 167-171
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