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Published in Rhodora, in 1913, in volume 15, issue 179, pages 204

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Published in Sida, Contributions To Botany, in 1996, in volume 17, issue 2, pages 423-435

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Published in Torreya, in 1936, in volume 36, issue 2, pages 37-40

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Published in Psyche: A Journal of Entomology, in 1959, in volume 66, issue 1-2, pages 1-12

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Published in Rhodora, in 1913, in volume 15, issue 170, pages 44

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Published in Proceedings of The American Philosophical Society, in 1896, in volume 35, issue 152, pages 205-212

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Published in Pacific Science, in 1959, in volume 13, issue 4, pages 335-341

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Published in Phytologia, in 1997, in volume 83, issue 4, pages 257-269

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Published in Annals of the Missouri Botanical Garden, in 1990, in volume 77, pages 110-117

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Published in American Fern Journal, in 1987, in volume 77, pages 1-15

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Published in Madroño, in 1974, in volume 22, issue 8, pages 381-390

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Published in Zeitschrift für Säugetierkunde, in 1990, in volume 55, pages 115-127

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Published in Phytologia, in 2017, in volume 99, issue 1, pages 74-82

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Published in Madroño, in 1980, in volume 27, issue 4, pages 186-188

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Published in Occasional Papers of the Museum of Natural History, The University of Kansas, in 1971, in volume 3, pages 1-62

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Published in Journal of Arachnology, in 1999, in volume 27, issue 3, pages 165-170

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Published in Botanical Gazette, in 1886, in volume 11, issue 11, pages 309

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Published in Journal of The Bombay Natural History Society, in 2001, in volume 98, issue 2, pages 317-318

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Published in Biol Bull, in 2002, in volume 203, pages 338-346

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Published in Annals of the Missouri Botanical Garden, in 1931, in volume 18, pages 509-540

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Published in Iheringia Serie Zoologia, in 1998, in volume 85, pages 67-73

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Published in Acta Botánica Mexicana, in 2013, in volume 103, pages 1-9

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Published in Acta Botánica Mexicana, in 2001, in volume 55, pages 1-5

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Published in Proceedings of The Biological Society of Washington, in 1991, in volume 104, issue 3, pages 448-458

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Published in Rhodora, in 1974, in volume 76, pages 650-665

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Published in Proceedings of The Biological Society of Washington, in 2003, in volume 116, pages 754-802

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