Published in Proceedings of The Zoological Society of London, in 1896, in volume 1896, pages 715

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Published in William Marriot Canby letters to Asa Gray, 1861-1895, in 1887, pages 1

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Published in Rhodora, in 1924, in volume 26, issue 303, pages 41-47

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Published in Veliger, in 1962, in volume 4, pages 213

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Published in Torreya, in 1928, in volume 28, issue 1, pages 11-13

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Published in Veliger, in 1979, in volume 21, pages 373-374

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Published in Torreya, in 1913, in volume 13, issue 1, pages 1-13

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Published in The Auk, in 1916, in volume 33, pages 214-215

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Published in Psyche: A Journal of Entomology, in 1916, in volume 23, issue 1, pages 21-22

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Published in Rhodora, in 1969, in volume 71, issue 785, pages 160-164

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Published in Journal of South African Botany, in 1939, in volume 5, pages 75-79

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Published in The Auk, in 1919, in volume 36, pages 435-436

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Published in The Auk, in 1901, in volume 18, pages 288-289

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Published in The Auk, in 1917, in volume 34, pages 275-282

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Published in Muelleria, in 2006, in volume 23, pages 7-14

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Published in Psyche, in 1940, in volume 47, issue 2-3, pages 57-59

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Published in Rhodora, in 1969, in volume 71, issue 785, pages 165

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Published in Botanical Gazette, in 1918, in volume 65, issue 3, pages 250-260

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Published in Jour Washington Acad Sci, in 1940, in volume 30, pages 255-262

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Published in Rhodora, in 1940, in volume 42, issue 501, pages 309-343

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Published in Botanical Gazette, in 1915, in volume 60, issue 5, pages 406-411

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Published in Botanical Gazette, in 1916, in volume 62, issue 6, pages 488-506

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Published in The Auk, in 1898, in volume 15, pages 206-207

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Published in Veliger, in 1979, in volume 21, pages 369-372

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Published in Palaeontology, in 1988, in volume 31, issue 4, pages 957-964

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Published in Annals And Magazine of Natural History, in 1885, in volume 15, pages 384-387

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Published in Botanical Gazette, in 1921, in volume 71, issue 3, pages 220-235

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Published in Madroño, in 1942, in volume 6, issue 5, pages 167-171

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Published in Journal of The Washington Academy of Sciences, in 1926, in volume 16, pages 132-138

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Published in Annals And Magazine of Natural History, in 1839, in volume 3, pages 73-76

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Published in Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne, in 1870, in volume 3, issue 2, pages 361-373

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Published in Nautilis, in 1942, in volume 55, pages 120-125

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Published in Biol Bull, in 1946, in volume 90, pages 220-233

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Published in Biol Bull, in 1956, in volume 110, pages 69-76

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Published in Botanical Gazette, in 1914, in volume 58, issue 5, pages 432-444

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Published in Bulletin Du Museum Paris, in 1920, in volume 26, pages 388-394

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Published in Nautilis, in 1915, in volume 29, pages 28-29

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Published in Palaeontology, in 1964, in volume 7, issue 2, pages 281-285

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Published in Rhodora, in 1974, in volume 76, issue 806, pages 310

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Published in Zoologica, in 1936, in volume 21, issue 5, pages 85-87

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Published in Western Australian Naturalist, in 1975, in volume 13, issue 2/3, pages 29-34

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Published in Contributions in Science, in 1961, in volume 48, pages 1-12

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Published in Rhodora, in 1944, in volume 46, issue 541, pages 21-23

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Published in Biol Bull, in 1987, in volume 173, pages 489-503

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Published in Proceedings of The Zoological Society of London, in 1922, in volume 1922, pages 971-981

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Published in Biol Bull, in 1932, in volume 63, pages 258-270

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Published in Journal of South African botany, in 1942, in volume 8, pages 197-199

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Published in Botanical Gazette, in 1910, in volume 50, issue 5, pages 321-339

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