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Published in Madroño, in 1949, in volume 10, issue 3, pages 87-93
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Published in Ibis, in 1910, in volume 4, issue 4, pages 716-729
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Published in Transactions of The Royal Entomological Society of London, in 1918, in volume 66, pages 117
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Published in Phytologia, in 1991, in volume 71, pages 387-389
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Published in Phytologia, in 1990, in volume 69, pages 47-50
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Published in The Wilson Bulletin, in 1900, in volume 12, issue 3, pages 17
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Published in Rhodora, in 1944, in volume 46, issue 541, pages 28
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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 Rhodora, in 1959, in volume 61, issue 725, pages 127-136
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Published in The Auk, in 1903, in volume 20, pages 64
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