Coahuila twintip: A mostly Mexican species, this plantain is a worthy addition to the Texas flora, with relatively recent collections in Presidio, Jeff Davis, and Brewster counties in the U.S.
Apparently, the plant was first discovered by Richard Worthington in 1995, in Presidio County, in the “vicinity of Sauceda Ranch,” in what is now BBR. In 2004, Billie Turner located the species in silty limestone soils at one site in extreme western Jeff Davis County (Turner, 2005). In Brewster County, Coahuila twintip was first identified by Wendy Weckesser at Reed Plateau, and later collected by me and others in BBNP, below Stuart’s Peak and near Ernst Tinaja.
Subsequently, from 2009 to 2012, I encountered Coahuila twintip at three Presidio County locations in BBR. Coahuila twintip is much more widespread in northern Mexico, documented in southeastern Chihuahua, Coahuila, northern Durango, and northern Zacatecas.
——Roy Morey