You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Language UND Remove constraint Language: UND Place Black shale hills 1.5 mi. S. of Hwy 160 on road to Arboles, just e. of Chimney Rock. Remove constraint Place: Black shale hills 1.5 mi. S. of Hwy 160 on road to Arboles, just e. of Chimney Rock. Place Colorado Remove constraint Place: Colorado Place North America Remove constraint Place: North America Place USA Remove constraint Place: USA Topic Aristida Remove constraint Topic: Aristida Topic Poaceae Remove constraint Topic: Poaceae