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Published in Asa Gray correspondence. Senders A, in 1837, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1837, pages 1-3

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Published in Asa Gray correspondence. Senders A, in 1864, pages 1

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Published in Asa Gray correspondence. Senders A, in 1866, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1873, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1876, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1877, pages 1-4

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Published in Asa Gray correspondence. Senders A, in 1873, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1875, pages 1-2

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Published in Asa Gray correspondence. Senders A, in 1888, pages 1-3

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Published in Asa Gray correspondence. Senders A, in 1889, pages 1

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Published in Veliger, in 1973, in volume 16, pages 121-122

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Published in Bulletin of The African Bird Club, in 2010, in volume 17, issue 2, pages 225-228

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Published in American Fern Journal, in 1931, in volume 21, pages 11-20

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Published in The Great Basin Naturalist, in 1946, in volume 7, pages 29

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Published in Botanical Gazette, in 1890, in volume 15, issue 11, pages 299-304

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Published in Annals of the Missouri Botanical Garden, in 1954, in volume 41, pages 329-338

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Published in The Auk, in 1904, in volume 21, pages 91-92

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Published in Victorian Naturalist, in 1897, in volume 14, pages 5-7

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Published in The Great Basin Naturalist, in 1984, in volume 44, pages 416-420

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Published in Biol Bull, in 1976, in volume 150, pages 337-347

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Published in Annals of the Missouri Botanical Garden, in 1954, in volume 41, pages 395-418

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Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 3-38

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Published in Acta Botánica Mexicana, in 2006, in volume 74, pages 179-183

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Published in Veliger, in 1962, in volume 4, pages 167-174

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Published in Botanical Gazette, in 1887, in volume 12, issue 8, pages 192

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Published in Torreya, in 1908, in volume 8, issue 12, pages 287-292

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Published in Journal of The Asiatic Society of Bengal, in 1864, in volume 32, issue III, pages 189-218

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Published in Proc. zool. Soc. Lond, in 1892, in volume 1892, pages 3-24

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Published in Palaeontology, in 1998, in volume 41, issue 3, pages 387-421

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