You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place About 5 mi. E. of Ciudad Guerrero on Rt. 16. Roadside near corn fields on hilltop. Remove constraint Place: About 5 mi. E. of Ciudad Guerrero on Rt. 16. Roadside near corn fields on hilltop. Place Chihuahua Remove constraint Place: Chihuahua Place Mexico Remove constraint Place: Mexico Topic Asteraceae Remove constraint Topic: Asteraceae Topic Plantae Remove constraint Topic: Plantae