Probable Base Number for Genus x = 15
T. wrightii n=15 ref Turner et al. 1962
References
BLT 1997, Turner, B. L. 1997. The Comps of Mexico. Eupatorieae. Phytologia Memoirs Vol. 11.
Turner, B. L., A. M. Powell, and R. M. King. 1962. Chromosome numbers in the Compositae VI. Additional Mexican and Guatemalan Species. Rhodora 64: 251-271.