Ambrosia psilostachya DC. | Amo Rodríguez, S. & A. Gómez Pompa. 1976 [1977]. Variability in Ambrosia cumanensis (Compositae). Syst. Bot. 1(4): 363–372. | 79-81 | | 18,27,36,45,54,63,72 |
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Ambrosia psilostachya DC. | Keil, D. J. & T. F. Stuessy. 1975. Chromosome counts of Compositae from the United States, Mexico and Guatemala. Rhodora 77: 171–195. | 75-78 | 18 | |
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Ambrosia psilostachya DC. | Keil, D. J. & T. F. Stuessy. 1975. Chromosome counts of Compositae from the United States, Mexico and Guatemala. Rhodora 77: 171–195. | 75-78 | 54 | |
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Ambrosia psilostachya DC. | Keil, D. J. & T. F. Stuessy. 1975. Chromosome counts of Compositae from the United States, Mexico and Guatemala. Rhodora 77: 171–195. | 75-78 | ca.36 | |
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