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Published in Biol Bull, in 1932, in volume 63, pages 81-98

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Published in Biol Bull, in 1933, in volume 64, pages 70-85

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Published in Wiener Entomologische Zeitung, in 1914, in volume 33, pages 124-130

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Published in Compositae Newsletter, in 1995, in volume 25, pages 46-49

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Published in Psyche: A Journal of Entomology, in 1986, in volume 93, issue 1-2, pages 103-106

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Published in Journal of South African botany, in 1964, in volume 30, pages 27-29

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Published in Wiener Entomologische Zeitung, in 1911, in volume 30, pages 99

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Published in Compositae Newsletter, in 1999, in volume 34, pages 29-36

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Published in Compositae Newsletter, in 2003, in volume 39, pages 52-57

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Published in Compositae Newsletter, in 2006, in volume 44, pages 12-13

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Published in Wiener Entomologische Zeitung, in 1914, in volume 33, pages 52

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Published in Wiener Entomologische Zeitung, in 1912, in volume 31, pages 227-232

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Published in Wiener Entomologische Zeitung, in 1914, in volume 33, pages 53-56

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Published in Biol Bull, in 1966, in volume 131, pages 331-345

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Published in Journal of South African Botany, in 1982, in volume 48, issue 2, pages 273-275

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Published in Compositae Newsletter, in 1995, in volume 27, pages 31-42

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Published in Mitteilungen der Botanischen Staatssammlung München, in 1961, in volume 4, pages 125-126

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Published in Biol Bull, in 1966, in volume 131, pages 346-361

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Published in Journal of South African Botany, in 1982, in volume 48, issue 2, pages 277-278

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Published in Wiener Entomologische Zeitung, in 1911, in volume 30, pages 76-77

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Published in Compositae Newsletter, in 2006, in volume 44, pages 50-73

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Published in Compositae Newsletter, in 2012, in volume 50, pages 70-77

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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 Wiener Entomologische Zeitung, in 1911, in volume 30, pages 200-201

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Published in Compositae Newsletter, in 2002, in volume 38, pages 42-46

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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 Wiener Entomologische Zeitung, in 1907, in volume 26, pages 21-22

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Published in Compositae Newsletter, in 2011, in volume 49, pages 1-7

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Published in Compositae Newsletter, in 2008, in volume 46, pages 76-80

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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 Novon: A Journal For Botanical Nomenclature, in 2009, in volume 19, pages 76-79

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Published in Compositae Newsletter, in 2006, in volume 44, pages 24-31

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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 Compositae Newsletter, in 2012, in volume 50, pages 56-69

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Published in Rhodora, in 1947, in volume 49, pages 67-68

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Published in Rhodora, in 2003, in volume 105, issue 921, pages 92-93

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