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Published in American Fern Journal, in 1980, in volume 70, pages 45-46

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Published in Journal of The Arnold Arboretum, in 1981, in volume 62, issue 2, pages 129-209

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Published in Journal of the Arnold Arboretum, in 1984, in volume 65, pages 145-147

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Published in Fieldiana: Botany, New Series, in 2000, in volume 41, pages 1-69

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Published in Sida, Contributions To Botany, in 1983, in volume 10, issue 1, pages 33-36

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Published in Journal of The Arnold Arboretum, in 1986, in volume 67, issue 4, pages 441-469

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Published in Journal of The Arnold Arboretum, in 1979, in volume 60, issue 4, pages 477-503

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Published in Annals of the Missouri Botanical Garden, in 1983, in volume 70, pages 203-204

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Published in Annals of the Missouri Botanical Garden, in 1991, in volume 78, pages 262-263

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Published in Entomologist's Record and Journal of Variation, in 1978, in volume 90, issue 4, pages 116-121

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Published in Sida, Contributions To Botany, in 1986, in volume 11, issue 3, pages 329-333

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Published in Sida, Contributions To Botany, in 1984, in volume 10, issue 3, pages 203-206

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Published in Sida, Contributions To Botany, in 1990, in volume 14, issue 2, pages 263-266

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Published in Novitates Zoologicae,, in 1904, in volume 11, issue 1, pages 310-322

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Published in Novon, in 2005, in volume 15, pages 50-54

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Published in Annals And Magazine of Natural History, in 1841, in volume 6, pages 401-402

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Published in Special publication of Carnegie Museum of Natural History, in 1994, in volume 18, pages 241-257

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Published in Journal of Raptor Research, in 1997, in volume 31, issue 4, pages 384-385

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Published in Journal of The Botanical Research Institute of Texas, in 2010, in volume 4, issue 1, pages 51-54

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Published in Fieldiana Botany new series, in 1986, in volume 17, pages 1-28

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Published in Mycotaxon, in 2011, in volume 115, issue 1, pages 345-351

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Published in Sida, Contributions To Botany, in 1994, in volume 16, issue 2, pages 225-231

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Published in The Wilson Bulletin, in 1971, in volume 83, issue 2, pages 186-193

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Published in Fieldiana: Botany, New Series, in 1986, in volume 17, pages 1-24

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Published in Asa Gray correspondence. Senders Br-Bz, in 1884, pages 1-2

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Published in Natural History Review, in 1855, in volume 2, pages 59-64

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