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Published in Rhodora, in 1955, in volume 57, pages 219-240
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Published in American Fern Journal, in 1950, in volume 40, pages 21-32
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Published in Phytologia, in 2007, in volume 89, issue 2, pages 129-131
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Published in American Fern Journal, in 1966, in volume 56, pages 101-107
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Published in Rhodora, in 1966, in volume 68, pages 121-138
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Published in Rhodora, in 1958, in volume 60, issue 720, pages 309-316
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Published in American Fern Journal, in 1983, in volume 73, pages 1-5
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Published in American Fern Journal, in 1983, in volume 73, pages 53-62
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Published in American Fern Journal, in 1966, in volume 56, pages 3-17
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Published in American Fern Journal, in 1972, in volume 62, pages 33-43
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Published in Contributions from the University of Michigan Herbarium, in 1999, in volume 22, pages 135-187
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Published in American Fern Journal, in 1964, in volume 54, pages 105-113
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Published in Rhodora, in 1965, in volume 66, issue 767, pages 255-266
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Published in Contributions From The University of Michigan Herbarium, in 1982, in volume 15, pages 315-324
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Published in Novon, in 1995, in volume 5, pages 183-187
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Published in American Fern Journal, in 1982, in volume 72, pages 97-102
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Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 313-325
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Published in Rhodora, in 1958, in volume 60, issue 715, pages 177-204
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Published in American Fern Journal, in 1989, in volume 79, pages 1-6
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Published in Madroño, in 1980, in volume 27, issue 1, pages 47-48
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Published in Journal of The Lepidopterists' Society, in 1982, in volume 35, pages 247
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Published in American Fern Journal, in 2002, in volume 92, pages 39
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Published in Madroño, in 1962, in volume 16, issue 5, pages 158-161
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