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Published in American Fern Journal, in 1982, in volume 72, pages 65-75
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Published in The Auk, in 1916, in volume 33, pages 434
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Published in Rhodora, in 1899, in volume 1, issue 10, pages 193
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Published in The Auk, in 1911, in volume 28, pages 179-188
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Published in The Auk, in 1914, in volume 31, pages 257-258
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Published in The Auk, in 1916, in volume 33, pages 77
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Published in Bothalia, in 1922, in volume 1, pages 105-109
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Published in Bothalia, in 1922, in volume 1, pages 57-58
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Published in Madroño, in 1972, in volume 21, issue 5, pages 265-267
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