Porophyllum ruderale (Jacq.) Cass. | Robinson, H. E., A. M. Powell, R. M. King & J. F. Weedin. 1981. Chromosome Numbers in Compositae, XII: Heliantheae. Smithsonian Contr. Bot. 52: 1–28. | 84-85 | 22-24, 34-36 | |
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Porophyllum ruderale (Jacq.) Cass. | Dillon, M. O. & B. L. Turner. 1982. Chromosome numbers of Peruvian Compositae. Rhodora 84: 131–137. | 82-83 | ca.12 | |
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Porophyllum ruderale (Jacq.) Cass. | Carr, G. D., R. M. King, A. M. Powell & H. E. Robinson. 1999. Chromosome numbers in Compositae. XVIII. Amer. J. Bot. 86(7): 1003–1013. | 98-00 | 23II | |
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Porophyllum ruderale (Jacq.) Cass. | Turner, B. L., J. BACON, L. Urbatsh & B. Simpson. 1979. Chromosome numbers in South American Compositae. Amer. J. Bot. 66: 173–178. | 79-81 | 22 | |
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Porophyllum ruderale (Jacq.) Cass. | Molero, J., A. Rovira, J. Simón, R. Duré & D. Franco. 2002. IOPB chromosome data 18. Newslett. Int. Organ. Pl. Biosyst. (Pruhonice) 34: 22–24. | 01-03 | | 44 |
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Porophyllum ruderale (Jacq.) Cass. | Powell, A. M., D. W. KYHOS & P. H. Raven. 1975. Chromosome numbers in Compositee. XI. Helenieae. Amer. J. Bot. 62: 1100–1103. | 75-78 | 22 | |
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