CCDB → Angiosperms → Compositae → Senecio → Senecio flaccidus Less.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20(1) | Asteracea | Ward 1983 Phytologia | |||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20(1) | Asteracea | Ward 1983 Phytologia | |||
| ! | Senecio filifolius Nutt. | Senecio flaccidus Less. | 20(2) | Asteracea | Powell & T. 1963 Madrono | ||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20(1) | Asteracea | Powell et al. 1974 Amer. J. Bot. | |||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20(1) | Asteracea | Windham & S. 1983 Taxon | |||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20II(3) | Asteracea | Freeman & B. 1988 Sida (= J. Bot. Res. Inst. Texas) | |||
| Senecio flaccidus Less. | Senecio flaccidus Less. | 20II(1) | Asteracea | Powell & W. 2005 Sida (= J. Bot. Res. Inst. Texas) | |||
| Senecio flaccidus var. flaccidus | Senecio flaccidus Less. | 20(1) | Asteracea | Powell & T. 1963 Madrono | |||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20II | IPCN online | Strother, J. L. 1983. More chromosome studies in Compositae. Amer. J. Bot. 70(8): 1217–1232. | ||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20II | IPCN online | Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250. | ||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20 | IPCN online | Ward, D. E. 1983. Chromosome counts from New Mexico and southern Colorado. Phytologia 54: 302–309. | ||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20 | IPCN online | Windham, M. D. & C. Schaack. 1983. Chromosome counts for Adiantaceae, Aspleniaceae, Asteraceae and Poaceae. In: A. Löve (editor), IOPB Chromosome Number Reports LXXXI. Taxon 32: 664–665. | ||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20 | IPCN online | 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. | ||
| ! | Senecio douglasii var. longilobus (Benth.) L. D. Benson | Senecio flaccidus Less. | 20 | IPCN online | Keil, D. J. & T. F. Stuessy. 1977. Chromosome counts of Compositae from Mexico and the United States. Amer. J. Bot. 64: 791–798. | ||
| Senecio flaccidus Less. | Senecio flaccidus Less. | 20 | IPCN online | Keil, D. J. & T. F. Stuessy. 1977. Chromosome counts of Compositae from Mexico and the United States. Amer. J. Bot. 64: 791–798. | |||
| Senecio flaccidus Less. | Senecio flaccidus Less. | 20II | IPCN online | Powell, A. M. & J. F. Weedin. 2005. Documented chromosome numbers 2005: 2. Counts from western Texas, mostly trans-Pecos cacti. Sida 21(3): 1665–1668. | |||
| Senecio longilobus Benth. | Senecio flaccidus Less. | 20 | IPCN67-71 | ORNDUFF, R., T. MOSQUIN, D. W. KYHOS, & P. H. RAVEN. 1967. Chromosome numbers in Compositae. VI. Senecioneae. II. Am. Jour. Bot. 54: 205-213. | |||
| Senecio longilobus Benth. | Senecio flaccidus Less. | 40 | IPCN73-74 | KOVANDA, M. 1972. Somatic chromosome numbers for some Asteraceae. Rhodora 74: 102-116. | |||
| Senecio longilobus Benth. | Senecio flaccidus Less. | 20 | IPCN73-74 | POWELL, A.M., D.W. KYHOS, & P.H. RAVEN. 1974. Chromosome numbers in Compositae. X. Amer. J. Bot. 61: 909-913. | |||
| Senecio longilobus Benth. | Senecio flaccidus Less. | 20 | Cave1959 | Jackson 1959a | |||
| ! | Senecio filifolius Nutt. | Senecio flaccidus Less. | 20 | Cave1963 | Powell & T. 1963 |