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Published in Botanical Gazette, in 1918, in volume 65, issue 5, pages 475-478

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Published in Rhodora, in 1970, in volume 72, issue 789, pages 17-46

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Published in Sida, Contributions To Botany, in 1969, in volume 3, issue 6, pages 449

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Published in Journal of the Arnold Arboretum, in 1970, in volume 51, pages 257-309

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Published in Bulletin of The British Ornithologists' Club, in 1963, in volume 83, pages 77

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Published in Bulletin of The British Ornithologists' Club, in 1986, in volume 106, pages 87-88

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Published in Biol Bull, in 1982, in volume 162, pages 113-123

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Published in Rhodora, in 1966, in volume 68, issue 776, pages 432-434

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Published in The Naturalist's Miscellany, in 1801, in volume 13, issue CXLVI

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Published in The Naturalist's Miscellany, in 1802, in volume 13, issue CL

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Published in The Naturalist's Miscellany, in 1804, in volume 16, issue CLXXXII

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Published in Sida, Contributions To Botany, in 1966, in volume 2, issue 6, pages 419-427

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Published in Victorian Naturalist, in 1993, in volume 110, pages 86-91

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Published in Entomologist's Record and Journal of Variation, in 1984, in volume 96, issue 1-2, pages 33

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