Chaenactis douglasii (Hook.) Hook. & Arn. | Chinnappa, C. C. & J. G. Chmielewski. 1987. Documented plant chromosome numbers 1987: 1. Miscellaneous counts from western North America. Sida 12: 409–417. | 86-87 | | c.26 |
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Chaenactis douglasii (Hook.) Hook. & Arn. | Mooring, J. S. 1992. Chromosome numbers and geographic distribution in Chaenactis douglasii (Compositae, Helenieae). Madroño 39(4): 263–270. | 92-93 | 6II, 12II+0-1+0-1I, 12II+0-1 fragm., 15II | 11, 12 |
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Chaenactis douglasii (Hook.) Hook. & Arn. | Turner, B. L. & Z. Zhao. 1992. Documented chromosome numbers 1992: 2. Miscellaneous U.S.A. and Mexican species, mostly Asteraceae. Sida 15: 147–150. | 92-93 | | 12 |
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Chaenactis douglasii (Hook.) Hook. & Arn. | Zhao, Z. & B. L. Turner. 1993. Documented chromosome numbers 1993: 3. Miscellaneous U.S.A. and Mexican species, mostly Asteraceae. Sida 15: 649–653. | 92-93 | | 12 |
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Chaenactis douglasii (Hook.) Hook. & Arn. | Mooring, J. S. 1980. A cytogeographic study of Chacnactis douglasii (Compositae, Helenicae). Amer. J. Bot. 67: 1304–1319. | 79-81 | | 37 |
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Chaenactis douglasii (Hook.) Hook. & Arn. | Keil, D. J. & D. J. Pinkava. 1976. Chromosome counts and taxonomic notes for Compositae from the United States and Mexico. Amer. J. Bot. 63: 1393–1403. | 75-78 | 6 | |
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