Published in Palaeontology, in 1983, in volume 26, issue 4, pages 845-849
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Published in Palaeontology, in 1984, in volume 27, issue 4, pages 825-841
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Published in Palaeontology, in 1989, in volume 32, issue 2, pages 313-323
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Published in Proceedings of The Biological Society of Washington, in 1994, in volume 107, pages 109-113
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Published in Palaeontology, in 1987, in volume 30, issue 3, pages 429-484
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Published in Rhodora, in 1963, in volume 65, issue 763, pages 241-242
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Published in Palaeontology, in 1984, in volume 27, issue 3, pages 623-634
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Published in Botanical Museum Leaflets, Harvard University, in 1941, in volume 9, pages 129-151
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Published in Palaeontology, in 1992, in volume 35, issue 1, pages 149-158
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Published in Botanical Museum Leaflets, Harvard University, in 1941, in volume 9, pages 152-158
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Published in Madroño, in 1968, in volume 19, issue 5, pages 187-192
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Published in Paleontological Research, in 1998, in volume 2, pages 283-284
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Published in Palaeontology, in 1964, in volume 7, issue 2, pages 286-305
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Published in Palaeontology, in 1985, in volume 28, issue 3, pages 527-543
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Published in Palaeontology, in 1988, in volume 31, issue 4, pages 1013-1028
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Published in Palaeontology, in 1989, in volume 32, issue 4, pages 689-710
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Published in Botanical Museum Leaflets, Harvard University, in 1940, in volume 8, pages 109-119
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Published in Palaeontology, in 1982, in volume 25, issue 2, pages 439-442
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Published in Rhodora, in 1966, in volume 68, issue 776, pages 420-428
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Published in Rhodora, in 1942, in volume 44, issue 523, pages 236-237
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Published in Botanical Museum Leaflets, Harvard University, in 1941, in volume 10, pages 41-58
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Published in Palaeontology, in 1986, in volume 29, issue 4, pages 809-825
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Published in Palaeontology, in 1989, in volume 32, issue 1, pages 101-107
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Published in Sida, Contributions To Botany, in 1980, in volume 8, issue 4, pages 317-319
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Published in American Fern Journal, in 1974, in volume 64, pages 97-98
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Published in Botanical Museum Leaflets, Harvard University, in 1940, in volume 8, pages 121-128
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Published in Madroño, in 1958, in volume 14, issue 7, pages 232-236
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Published in Palaeontology, in 1986, in volume 29, issue 2, pages 235-242
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Published in Botanical Museum Leaflets, Harvard University, in 1942, in volume 10, pages 61-92
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Published in Palaeontology, in 1992, in volume 35, issue 1, pages 27-35
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Published in American Fern Journal, in 1978, in volume 68, pages 63
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Published in Veliger, in 2003, in volume 46, pages 355-361
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Published in American Fern Journal, in 1976, in volume 66, pages 46-48
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Published in Journal of The Arnold Arboretum, in 1979, in volume 60, issue 1, pages 154-162
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Published in American Fern Journal, in 1962, in volume 52, pages 163
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Published in American Fern Journal, in 1978, in volume 68, pages 11-12
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Published in Australian Entomological Magazine, in 1989, in volume 16, issue 4, pages 99-108
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Published in Bull. Zool. Nom., in 1971, in volume 28, pages 8-10
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Published in Journal of The Arnold Arboretum, in 1977, in volume 58, issue 1, pages 40-51
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Published in Palaeontology, in 1989, in volume 32, issue 1, pages 231-235
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Published in Madroño, in 1976, in volume 23, issue 5, pages 300
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Published in Palaeontology, in 1966, in volume 9, issue 2, pages 312-318
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Published in Palaeontology, in 1962, in volume 5, issue 1, pages 86-92
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Published in Journal of The Botanical Research Institute of Texas, in 2012, in volume 6, issue 1, pages 28
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Published in Phegea, in 1985, in volume 13, issue 3, pages 92
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Published in Rhodora, in 1973, in volume 75, issue 801, pages 149-153
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Published in Australian entomological magazine, in 1981, in volume 8, issue 1, pages 1-2
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Published in Nachrichtenblatt der Bayerischen Entomologen, in 1965, in volume 014, pages 4-8
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Published in Madroño, in 1952, in volume 11, issue 8, pages 308-309
Created: 2016-02-15, modified: 2016-07-07