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Published in Madroño, in 1937, in volume 4, issue 2, pages 72
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Published in Madroño, in 1937, in volume 4, issue 3, pages 103-104
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Published in Madroño, in 1936, in volume 3, issue 6, pages 256
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Published in Madroño, in 1936, in volume 3, issue 5, pages 224
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Published in Madroño, in 1935, in volume 3, issue 2, pages 116
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Published in Madroño, in 1940, in volume 5, issue 6, pages 204-205
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Published in Madroño, in 1940, in volume 5, issue 8, pages 273
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Published in Madroño, in 1941, in volume 6, issue 2, pages 64
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Published in Madroño, in 1941, in volume 6, issue 3, pages 96
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Published in Madroño, in 1936, in volume 3, issue 8, pages 373-374
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Published in Transactions of The Linnean Society of London, in 1837, in volume 17, pages 567-569
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Published in Madroño, in 1938, in volume 4, issue 7, pages 239-240
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1906, in volume 58, pages 593-594
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1899, in volume 51, pages 550
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 779
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1918, in volume 70, pages 359
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1910, in volume 62, pages 689
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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1902, in volume 54, pages 812
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Published in Botanical Gazette, in 1908, in volume 45, issue 4, pages 285
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Published in Madroño, in 1928, in volume 1, issue 11, pages 175-177
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Published in Madroño, in 1928, in volume 1, issue 12, pages 183-185
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Published in Botanical Gazette, in 1913, in volume 55, issue 4, pages 300-313
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doi:10.1086/331051
Published in Botanical Gazette, in 1879, in volume 4, issue 9, pages 212
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doi:10.1086/325278
Published in Botanical Gazette, in 1904, in volume 38, issue 6, pages 401-426
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Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 391-408
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Published in Bulletin of the Liverpool Museums under the City Council, in 1901, in volume 3, issue 2, pages 35-37
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Published in Botanical Gazette, in 1881, in volume 6, issue 2, pages 173-175
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Published in Madroño, in 1933, in volume 2, issue 10, pages 83-88
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