Somalia’s Yeheb tree is vanishing. Turning Cordeauxia edulis into a domesticated crop could secure food, fodder and fragile drylands. In the sun-scored rangelands of Hiiraan, Galmudug, Mudug and the Somali-Ethiopian borderlands, a native lifeline grows almost nowhere else on Earth: the Yeheb tree (Cordeauxia edulis), known locally as Jicib. Long relied upon for its edible nuts, livestock fodder and soil-restoring roots, this wild leguminous shrub is quietly slipping away—its populations down as much as 70% under pressure…