Published in Botanical Gazette, in 1919, in volume 68, issue 2, pages 73-108

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Published in Jour Washington Acad Sci, in 1941, in volume 31, pages 173-179

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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 273-277

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Published in Proceedings of The United States National Museum, in 1911, in volume 41, pages 209-224

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Published in Proceedings of the United States National Museum, in 1927, in volume 69, issue 2640, pages 1-42

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Published in Proceedings of The United States National Museum, in 1941, in volume 91, pages 91-102

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Published in Proceedings of The United States National Museum, in 1911, in volume 39, pages 497-527

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Published in Proceedings of The United States National Museum, in 1922, in volume 61, pages 1-160

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, issue 4, pages 156-162

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Published in United States National Museum Bulletin, in 1923, in volume 125, pages 1-302

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Published in United States National Museum Bulletin, in 1933, in volume 165, pages 1-108

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Published in Proceedings of the United States National Museum, in 1930, in volume 76, pages 1-78

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Published in United States National Museum Bulletin, in 1917, in volume 96, pages 1-87

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Published in Proceedings of The United States National Museum, in 1913, in volume 46, pages 57-59

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Published in Proceedings of The United States National Museum, in 1908, in volume 34, pages 407-432

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Published in Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie, in 2002, in volume 42, pages 51-74

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Published in Proceedings of The United States National Museum, in 1941, in volume 89, pages 519-522

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Published in Proceedings of The United States National Museum, in 1906, in volume 30, pages 1-66

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Published in Proceedings of The United States National Museum, in 1908, in volume 35, pages 133-154

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Published in Bulletin du Museum national d'histoire naturelle, in 1948, in volume 20, issue 2, pages 183-189

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Published in Bulletin du Museum national d'histoire naturelle, in 1948, in volume 20, issue 1, pages 115-119

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Published in Proceedings of The United States National Museum, in 1903, in volume 26, pages 565-591

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Published in Proceedings of The United States National Museum, in 1906, in volume 30, pages 149-164

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Published in Bulletin of the British Museum (Natural History). Geology., in 1985, in volume 38, issue 4, pages 359-372

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Published in Proceedings of The United States National Museum, in 1908, in volume 35, pages 277-340

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Published in Bull. Brit. Mus. Nat. Hist. (Zool.), in 1964, in volume 12, pages 1-35

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Published in Bulletin du Museum national d'histoire naturelle, in 1946, in volume 18, issue 3, pages 274-279

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Published in Asa Gray correspondence. Senders B-Ba, in 1885, pages 1-6

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Published in Asa Gray correspondence. Senders B-Ba, in 1886, pages 1-6

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Published in William Marriot Canby letters to Asa Gray, 1861-1895, pages 1-2

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in 1853, pages 1-2

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Published in Phytologia, in 1990, in volume 68, pages 234-238

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Published in Asa Gray correspondence. Senders B-Ba, in 1891, pages 1-2

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Published in Erythea, in 1893, in volume 1, pages 145-147

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Published in Nautilus, in 1913, in volume 26, pages 109-110

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Published in Nautilis, in 1939, in volume 53, pages 8-16

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Published in Rhodora, in 1908, in volume 10, issue 119, pages 208

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Published in Stuttgarter Beiträge Naturkunde, in 1961, in volume 58, pages 1-13

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Published in Erythea, in 1893, in volume 1, pages 197-206

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Published in Entomological News, in 1987, in volume 98, pages 135-139

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Published in Proceedings of the Malacological Society of London, in 1907, in volume 7, issue 5, pages 243

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Published in Journal of The Bombay Natural History Society, in 1932, in volume 35, pages 891-893

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Published in Phytoneuron, in 2013, in volume 2013-62, pages 1

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Published in Phytologia, in 2009, in volume 91, issue 3, pages 439

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Published in Compositae Newsletter, in 1993, in volume 23, pages 1-2

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Published in Compositae Newsletter, in 1997, in volume 31, pages 1-16

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Published in Proceedings of the Malacological Society of London, in 1908, in volume 8, issue 2, pages 62-63

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Published in Proceedings of the Malacological Society of London, in 1909, in volume 8, issue 5, pages 268

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