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Published in Rhodora, in 1993, in volume 95, issue 882, pages 122-128
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Published in American Fern Journal, in 1995, in volume 85, pages 89-94
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Published in Annals of the Missouri Botanical Garden, in 1974, in volume 61, pages 310-317
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Published in Rhodora, in 1966, in volume 68, issue 773, pages 59-92
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Published in Rhodora, in 1941, in volume 43, issue 505, pages 35-36
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Published in Rhodora, in 1981, in volume 83, pages 421-431
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Published in Asa Gray correspondence. Senders Br-Bz, in 1882, pages 1-2
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Published in Asa Gray correspondence. Senders Br-Bz, in 1888, pages 1-2
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Published in Asa Gray correspondence. Senders Br-Bz, in 1888, pages 1-2
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Published in Torreya, in 1904, in volume 4, issue 2, pages 23-26
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Published in Torreya, in 1901, in volume 1, issue 7, pages 82-84
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Published in Asa Gray correspondence. Senders Br-Bz, in 1891, pages 1
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Published in Asa Gray correspondence. Senders Br-Bz, in 1890, pages 1-2
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Published in Asa Gray correspondence. Senders Br-Bz, in 1890, pages 1
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Published in Asa Gray correspondence. Senders Br-Bz, in 1890, pages 1
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Published in Asa Gray correspondence. Senders Br-Bz, in 1891, pages 1-2
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Published in Asa Gray correspondence. Senders Br-Bz, in 1891, pages 1
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Published in Asa Gray correspondence. Senders Br-Bz, in 1891, pages 1-2
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Published in Asa Gray correspondence. Senders Br-Bz, in 1890, pages 1
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