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Published in Rhodora, in 1929, in volume 31, issue 367, pages 142-143
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Published in Rhodora, in 1927, in volume 29, issue 337, pages 15-16
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Published in Madroño, in 1953, in volume 12, issue 3, pages 65-81
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Published in Annals of the Missouri Botanical Garden, in 1981, in volume 68, pages 75-86
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Published in Madroño, in 2013, in volume 60, pages 302-319
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Published in Great Basin Naturalist Memoirs, in 1979, in volume 3, pages 113-117
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Published in Madroño, in 1941, in volume 6, issue 4, pages 137-141
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Published in Madroño, in 1942, in volume 6, issue 8, pages 241-258
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Published in Madroño, in 1945, in volume 8, issue 1, pages 31-32
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Published in Proceedings of The Biological Society of Washington, in 1981, in volume 94, pages 295-313
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Published in Veliger, in 1987, in volume 30, pages 95
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Published in Great Basin Naturalist Memoirs, in 1979, in volume 3, pages 87-93
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Published in Madroño, in 1949, in volume 10, issue 3, pages 70-81
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Published in Madroño, in 1978, in volume 25, issue 4, pages 218-220
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Published in Proceedings of The Biological Society of Washington, in 1980, in volume 93, pages 849-874
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Published in Palaeontology, in 1963, in volume 5, issue 4, pages 712-726
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Published in Madroño, in 1948, in volume 9, issue 6, pages 193-199
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Published in Madroño, in 1981, in volume 28, issue 3, pages 190-191
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Published in Palaeontology, in 1962, in volume 5, issue 2, pages 213-224
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Published in Memoirs of the Queensland Museum, in 1935, in volume 10, pages 230
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Published in Scientific reports John Murray Expedition 1933-34, in 1937, in volume 4, issue 6, pages 131-201
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Published in The Victorian Naturalist, in 1899, in volume 16, issue 7, pages 112-113
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Published in Great Basin Naturalist, in 1978, in volume 38, pages 429-437
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Published in Annals of the Missouri Botanical Garden, in 1985, in volume 72, pages 824-832
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Published in Proceedings of The American Philosophical Society, in 1919, in volume 58, issue 220, pages 269-271
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Published in Madroño, in 1971, in volume 21, issue 2, pages 70-95
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Published in Scientific Reports / Great Barrier Reef Expedition 1928-29, in 1931, in volume 4, issue 4, pages 111-135
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Published in Annals of The South African Museum, in 1954, in volume 41, pages 81-158
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Published in Pacific Science, in 1955, in volume 9, issue 1, pages 26-30
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Published in Annals of the Missouri Botanical Garden, in 1965, in volume 52, pages 457-468
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doi:10.2307/2394810