You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Vicinity of Cerro Zempoaltepetl, near Piksa'ah (Piedra Redonda) about eight kilometers east of summit, along trail to Zacatepec Mixes Remove constraint Place: Vicinity of Cerro Zempoaltepetl, near Piksa'ah (Piedra Redonda) about eight kilometers east of summit, along trail to Zacatepec Mixes