Published in Biol Bull, in 1957, in volume 112, pages 196-219

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Published in Biol Bull, in 1956, in volume 110, pages 157-168

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Published in Biol Bull, in 1958, in volume 115, pages 257-268

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Published in American Fern Journal, in 1985, in volume 75, pages 128-132

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Published in Biol Bull, in 1927, in volume 53, pages 318-326

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Published in Biol Bull, in 1973, in volume 145, pages 83-90

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in 1879, pages 1

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Published in Proceedings of The American Philosophical Society, in 1871, in volume 12, issue 81, pages 171-173

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in 1888, pages 1-2

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Published in Biol Bull, in 1951, in volume 101, pages 84-94

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Published in Botanical Gazette, in 1915, in volume 60, issue 1, pages 27-44

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Published in The Coleopterists Bulletin, in 1979, in volume 33, issue 1, pages 9-16

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Published in Carnivorous plant newsletter, in 2007, in volume 36, issue 3, pages 83-86

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Published in Psyche: A Journal of Entomology, in 1975, in volume 82, issue 1, pages 74-77

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Published in University of Kansas Science Bulletin, in 1950, in volume 33, issue 8, pages 313-380

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Published in Madroño, in 1976, in volume 23, issue 6, pages 310-320

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Published in Madroño, in 1983, in volume 30, issue 4, pages 67-78

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Published in The Auk, in 1917, in volume 34, pages 226

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1846, pages 1-2

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Published in Asa Gray correspondence. Senders La-Le, 1833-1897 (inclusive), in 1887, pages 1-0

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Published in Ibis, in 1913, in volume 1, issue 2, pages 303-312

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Published in Torreya, in 1901, in volume 1, issue 12, pages 143-147

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1882, pages 1-2

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Published in Asa Gray correspondence. Senders Ha, 1835-1895 (inclusive), in 1846, pages 1-2

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Published in Asa Gray correspondence. Senders Ha, 1835-1895 (inclusive), in 1860, pages 1-2

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Published in Asa Gray correspondence. Senders Ca-Cl, in 1890, pages 1-2

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Published in Asa Gray correspondence. Senders Ha, 1835-1895 (inclusive), pages 1-3

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Published in Asa Gray correspondence. Senders Co-Cu, 1826-1891 (inclusive), in 1851, pages 1-2

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Published in British Journal of Entomology And Natural History, in 1990, in volume 3, pages 107-114

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Published in Torreya, in 1911, in volume 11, issue 7, pages 145-149

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