You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Callejón de San Francisco; Bavispe; Cañón de las Estacas Remove constraint Place: Callejón de San Francisco; Bavispe; Cañón de las Estacas Place Mexico Remove constraint Place: Mexico Place North America Remove constraint Place: North America Topic Echinochloa Remove constraint Topic: Echinochloa Topic Poaceae Remove constraint Topic: Poaceae Type still image Remove constraint Type: still image