Published in Bull. British Mus. (Nat. Hist.) Zoology, in 1976, in volume 29, issue 2, pages 83-116
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Published in Bulletin of the British Museum (Natural History) Zoology, in 1977, in volume 31, pages 187-248
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Published in Journal of The Arnold Arboretum, in 1962, in volume 43, issue 2, pages 218-219
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Published in Journal of The Arnold Arboretum, in 1962, in volume 43, issue 1, pages 108
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Published in Journal of The Arnold Arboretum, in 1946, in volume 27, issue 4, pages 355-360
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Published in Madroño, in 1964, in volume 17, issue 7, pages 235-236
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Published in Rhodora, in 1952, in volume 54, issue 643, pages 194-195
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Published in Rhodora, in 1936, in volume 38, issue 456, pages 409-413
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Published in Annals of the Missouri Botanical Garden, in 1966, in volume 53, pages 376
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Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 184
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Published in Rhodora, in 1969, in volume 71, issue 785, pages 160-164
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Published in Rhodora, in 1930, in volume 32, issue 379, pages 140-142
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Published in Rhodora, in 1900, in volume 2, issue 18, pages 107-111
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Published in Rhodora, in 1957, in volume 59, issue 697, pages 20-23
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Published in Madroño, in 2012, in volume 59, pages 232
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Published in Madroño, in 1955, in volume 13, issue 3, pages 110-112
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Published in Ibis, in 1885, in volume 3, issue 4, pages 380-389
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Published in Madroño, in 2012, in volume 59, pages 167
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Published in Telopea, in 1975, in volume 1, issue 1, pages 33-39
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Published in Rhodora, in 1926, in volume 28, issue 2, pages 31-34
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Published in Rhodora, in 1926, in volume 28, issue 3, pages 46-48
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Published in Rhodora, in 1903, in volume 5, issue 57, pages 213-219
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Published in Rhodora, in 1935, in volume 37, issue 436, pages 161-162
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Published in Rhodora, in 1944, in volume 46, issue 552, pages 493-494
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Published in Rhodora, in 1945, in volume 47, issue 564, pages 404
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Published in Rhodora, in 1946, in volume 48, issue 575, pages 391
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Published in Botanical Gazette, in 1900, in volume 29, issue 6, pages 437-441
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Published in Torreya, in 1931, in volume 31, issue 5, pages 129-135
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Published in Telopea, in 1975, in volume 1, issue 1, pages 84-86
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Published in Rhodora, in 1913, in volume 15, issue 177, pages 171-172
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Published in Rhodora, in 1942, in volume 44, issue 522, pages 220-227
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Published in Zitteliana, in 1982, in volume 10, pages 359-369
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Published in Botanical Gazette, in 1916, in volume 61, issue 1, pages 72-74
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Published in Botanical Gazette, in 1921, in volume 72, issue 5, pages 265-292
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Published in Torreya, in 1922, in volume 22, issue 4, pages 67-68
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Published in Torreya, in 1941, in volume 41, issue 6, pages 181-187
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Published in Telopea, in 1976, in volume 1, issue 2, pages 129-135
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Published in Compositae Newsletter, in 2001, in volume 36, pages 9-13
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Published in The Auk, in 1903, in volume 20, pages 38-42
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Published in Rhodora, in 1948, in volume 50, issue 591, pages 64-66
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Published in The Auk, in 1908, in volume 25, pages 230
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Published in The Auk, in 1891, in volume 8, pages 369-379
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Published in The Auk, in 1895, in volume 12, pages 187
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Published in Veliger, in 1960, in volume 3, pages 13-16
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Published in Rhodora, in 1919, in volume 21, issue 248, pages 147-148
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Published in Rhodora, in 1931, in volume 33, issue 392, pages 167-170
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Published in Rhodora, in 1965, in volume 67, issue 771, pages 217-238
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Published in Torreya, in 1944, in volume 44, issue 2, pages 39-44
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Published in Torreya, in 1914, in volume 14, issue 3, pages 39-42
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