[1]
A. M. . Powell, S. A. . Powell, and C. . Jackson, “Documented chromosome numbers 2017:1. Miscellaneous counts mostly from western Texas (U.S.A.), one each from New Mexico (U.S.A.) and Mexico”, J. Bot. Res. Inst. Texas, vol. 11, no. 1, pp. 143–146, Jul. 2017.