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Published in The Wilson Bulletin, in 1991, in volume 103, issue 4, pages 552-558

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Published in American Fern Journal, in 1991, in volume 81, pages 128-133

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Published in Ibis, in 1922, in volume 4, issue 3, pages 471-474

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Published in Transactions of the Kentucky Academy of Science, in 1977, in volume 38, issue 1-2, pages 26-37

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

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Published in The Great Basin Naturalist, in 1995, in volume 55, issue 2, pages 158-163

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Published in Phytologia, in 1971, in volume 22, issue 2, pages 83-84

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Published in Botanical Gazette, in 1888, in volume 13, issue 2, pages 40

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Published in Botanical Gazette, in 1911, in volume 52, issue 4, pages 328

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Published in Mycotaxon, in 1995, in volume 55, pages 269-274

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Published in The Wilson Bulletin, in 1978, in volume 90, issue 3, pages 423-437

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Published in Sida, Contributions To Botany, in 2005, in volume 21, issue 3, pages 1781-1791

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Published in Torreya, in 1908, in volume 8, issue 5, pages 103-110

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Published in Ibis, in 1906, in volume 6, issue 1, pages 46-52

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Published in The Wilson Bulletin, in 1977, in volume 89, issue 3, pages 505

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Published in The Wilson Bulletin, in 1990, in volume 102, issue 4, pages 571-580

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Published in The Wilson Bulletin, in 1973, in volume 85, issue 2, pages 148-162

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Published in Torreya, in 1904, in volume 4, issue 6, pages 81-86

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