You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Callejón de San Francisco; grasses of the region of the río de Bavispe; northeastern sonora. El Rancho de la Nacha, 25 miles west of La Angostura. Remove constraint Place: Callejón de San Francisco; grasses of the region of the río de Bavispe; northeastern sonora. El Rancho de la Nacha, 25 miles west of La Angostura. Place Mexico Remove constraint Place: Mexico Place Sonora Remove constraint Place: Sonora Topic Magnoliopsida Remove constraint Topic: Magnoliopsida Topic Poaceae Remove constraint Topic: Poaceae