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Published in Madroño, in 1957, in volume 14, issue 2, pages 74-79
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Published in Contributions From The University of Michigan Herbarium, in 1975, in volume 11, issue 2, pages 89-93
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Published in Rhodora, in 1931, in volume 33, issue 390, pages 139-140
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Published in The Wilson Bulletin, in 1916, in volume 28, issue 1, pages 11-18
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Published in Palaeontology, in 1974, in volume 17, issue 3, pages 587-598
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Published in Contributions From The University of Michigan Herbarium, in 1980, in volume 14, pages 53-56
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Published in Contributions From The University of Michigan Herbarium, in 2001, in volume 23, pages 107-114
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Published in Madroño, in 1939, in volume 5, issue 4, pages 135-136
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Published in Madroño, in 1943, in volume 7, issue 2, pages 63-64
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Published in Breviora, in 1963, in volume 184, pages 1-16
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Published in Palaeontology, in 1965, in volume 8, issue 2, pages 281-293
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Published in Rhodora, in 1965, in volume 67, issue 772, pages 405-406
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Published in Brimleyana, in 1995, in volume 22, pages 87-132
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Published in The Wilson Bulletin, in 1914, in volume 26, issue 4, pages 189-193
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