The rare Guadalupe fescue once thrived in abundance atop mountains spanning the Texas-Mexico border, however, the desert-growing perennial grass is now so endangered, it only flourishes in two locations on Earth. The rapid population decline is leaving scientists puzzled. "Developing an effective recovery plan is essential for protecting Guadalupe fescue, however, the lack of basic information about this species’ ecology is a serious barrier to that goal," explained Helen Poulos, adjunct assistant professor of environmental studies. "Urgent action is needed to stabilize the two extant populations." This summer, under Poulos's leadership, Wesleyan received a National Park Service Grant to study…