You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Agua Xoca; 20 mi by road SE of Tehuacán on road to Teotitlán del Camino, Oax. Remove constraint Place: Agua Xoca; 20 mi by road SE of Tehuacán on road to Teotitlán del Camino, Oax. Topic Euphorbia Remove constraint Topic: Euphorbia