You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Gilberto Tapia (Bloque Quinientos Catorce); Sierra Bojihuacame SE of Cd. Obregón Remove constraint Place: Gilberto Tapia (Bloque Quinientos Catorce); Sierra Bojihuacame SE of Cd. Obregón Place Sonora Remove constraint Place: Sonora Topic Croton Remove constraint Topic: Croton Topic Euphorbiaceae Remove constraint Topic: Euphorbiaceae