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Published in Nautilis, in 1938, in volume 51, pages 142-143

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Published in Annals of the Missouri Botanical Garden, in 1941, in volume 28, pages 409-491

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Published in Madroño, in 1981, in volume 28, issue 3, pages 159-162

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Published in Madroño, in 1981, in volume 28, issue 3, pages 188-190

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Published in Phytologia, in 1980, in volume 46, issue 5, pages 285-287

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Published in Madroño, in 1990, in volume 37, issue 3, pages 195-199

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Published in The Auk, in 1895, in volume 12, pages 70-71

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Published in Pacific Science, in 1951, in volume 5, issue 4, pages 291-297

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Published in Rhodora, in 1956, in volume 58, issue 690, pages 160-161

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Published in Madroño, in 1980, in volume 27, issue 3, pages 138-145

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Published in The Wilson Bulletin, in 1972, in volume 84, issue 2, pages 119-135

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Published in Bonner Zoologische Beiträge, in 2001, in volume 52, pages 297-309

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Published in Rhodora, in 1957, in volume 59, issue 701, pages 123-124

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Published in The Wilson Bulletin, in 1964, in volume 76, issue 3, pages 290

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Published in Pacific Science, in 1960, in volume 14, issue 3, pages 251-256

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Published in The Wilson Bulletin, in 1971, in volume 83, issue 1, pages 49-56

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Published in Madroño, in 1978, in volume 25, issue 1, pages 59

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1882, in volume 34, pages 226-230

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Published in The Great Basin Naturalist, in 1983, in volume 43, pages 739-740

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Published in Annals of the Missouri Botanical Garden, in 1965, in volume 52, pages 444-451

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Published in Pacific Science, in 1968, in volume 22, issue 3, pages 314-321

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Published in Psyche, in 1965, in volume 72, issue 3, pages 225-228

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Published in Journal of The Arnold Arboretum, in 1936, in volume 17, issue 1, pages 38-41

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Published in Rhodora, in 1957, in volume 59, issue 703, pages 181

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Published in Rhodora, in 1961, in volume 63, issue 746, pages 55-57

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Published in Rhodora, in 1972, in volume 74, issue 799, pages 347-349

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Published in The Wilson Bulletin, in 1968, in volume 80, issue 1, pages 94-99

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Published in American Fern Journal, in 1964, in volume 54, pages 89-91

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Published in Sida, Contributions To Botany, in 2006, in volume 22, issue 1, pages 21-23

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Published in Madroño, in 1984, in volume 31, issue 4, pages 203-207

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Published in Madroño, in 1994, in volume 41, issue 3, pages 228-233

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Published in American Fern Journal, in 1993, in volume 83, pages 67-70

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Published in Occasional Papers Museum of Texas Tech University, in 2003, in volume 229, pages 1-23

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Published in Biol Bull, in 1981, in volume 160, pages 250-264

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Published in Rhodora, in 1962, in volume 64, issue 759, pages 200-206

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Published in Rhodora, in 1958, in volume 60, issue 713, pages 125-128

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Published in Pacific Science, in 1956, in volume 10, issue 3, pages 314-317

Created: 2017-09-10, modified: 2017-09-10

Published in Rhodora, in 1957, in volume 59, issue 702, pages 125-128

Created: 2016-07-19, modified: 2016-07-19

Published in The Great Basin Naturalist, in 1983, in volume 43, pages 684-686

Created: 2017-11-16, modified: 2017-11-16

Published in Journal of Raptor Research, in 2003, in volume 37, issue 2, pages 176

Created: 2017-04-07, modified: 2017-04-07