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Published in Rhodora, in 1952, in volume 54, pages 57-67

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Published in American Fern Journal, in 1993, in volume 83, pages 46

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Published in Palaeontology, in 1988, in volume 31, issue 2, pages 373-418

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Published in Rhodora, in 1967, in volume 69, issue 778, pages 163-178

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Published in American Fern Journal, in 1991, in volume 81, pages 75

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Published in American Fern Journal, in 1995, in volume 85, pages 95-96

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Published in Veliger, in 1964, in volume 7, pages 129-133

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Published in The Wilson Bulletin, in 1995, in volume 107, issue 1, pages 64-72

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Published in The Coleopterists Bulletin, in 1978, in volume 32, issue 4, pages 367-372

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Published in Ibis, in 1922, in volume 4, issue 2, pages 254-256

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Published in Annals of the Missouri Botanical Garden, in 1988, in volume 75, pages 1248-1257

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Published in The Auk, in 1908, in volume 25, pages 306-309

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Published in Sida, Contributions To Botany, in 2003, in volume 20, issue 4, pages 1737-1757

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Published in The Wilson Bulletin, in 1965, in volume 77, issue 4, pages 327-339

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Published in Journal of The Royal Society of Western Australia, in 1994, in volume 77, issue 4, pages 107

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