Published in Transactions of the South African Philosophical Society, in 1886, in volume 5, issue 2, pages 235-246
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Published in Entomologist's Record and Journal of Variation, in 1969, in volume 81, pages 75-77
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Published in Transactions of the South African Philosophical Society, in 1886, in volume 5, issue 2, pages 259-265
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Published in Journal of the Arnold Arboretum, in 1983, in volume 64, pages 511-546
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Published in Entomologist's Record and Journal of Variation, in 1975, in volume 87, issue 4, pages 107-109
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Published in Journal of the Arnold Arboretum, in 1957, in volume 38, pages 151-169
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Published in Journal of The Washington Academy of Sciences, in 1958, in volume 48, pages 18-21
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Published in Biol Bull, in 1959, in volume 116, pages 136-161
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Published in Psyche, in 1913, in volume 20, pages 158-161
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Published in Phytologia, in 1988, in volume 65, issue 4, pages 285-289
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Published in Entomological News, in 1907, in volume 18, issue 9, pages 375-378
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Published in Journal of The Arnold Arboretum, in 1982, in volume 63, issue 1, pages 63-81
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Published in Transactions of the South African Philosophical Society, in 1886, in volume 5, issue 2, pages 205-218
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Published in Canadian Entomologist, in 1880, in volume 12, pages 158-159
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Published in Rhodora, in 1959, in volume 61, issue 723, pages 79-81
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Published in Madroño, in 1946, in volume 8, issue 6, pages 179-184
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Published in Madroño, in 1967, in volume 19, issue 3, pages 74-78
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Published in Entomologist's Record and Journal of Variation, in 1978, in volume 90, issue 10, pages 255-261
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Published in Psyche: A Journal of Entomology, in 1963, in volume 70, issue 1, pages 7-16
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Published in Rhodora, in 1973, in volume 75, issue 804, pages 493-516
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Published in Canadian Entomologist, in 1907, in volume 39, pages 102-103
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Published in Canadian Entomologist, in 1908, in volume 40, pages 239-241
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Published in Rhodora, in 1982, in volume 84, issue 837, pages 143-147
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Published in Journal of The Arnold Arboretum, in 1965, in volume 46, issue 4, pages 465-490
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Published in Journal of The Arnold Arboretum, in 1958, in volume 39, issue 4, pages 494-511
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Published in Canadian Entomologist, in 1900, in volume 32, pages 167-168
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Published in The Canadian Entomologist, in 1911, in volume 43, pages 292-294
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Published in Rhodora, in 2004, in volume 106, issue 926, pages 178-184
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Published in Sida, Contributions To Botany, in 1974, in volume 5, issue 5, pages 334-337
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Published in Nautilis, in 1915, in volume 29, pages 4-11
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Published in Palaeontology, in 1966, in volume 9, issue 3, pages 355-359
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Published in Journal of The Arnold Arboretum, in 1974, in volume 55, issue 3, pages 333-343
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Published in Journal of The Arnold Arboretum, in 1975, in volume 56, issue 3, pages 364-368
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Published in Madroño, in 1940, in volume 5, issue 5, pages 161-162
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Published in Rhodora, in 1940, in volume 42, issue 494, pages 40-47
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Published in Biol Bull, in 1960, in volume 119, pages 494-528
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