What is "qantumayu"

Qantumayu ( Quechua qantu, qantus, qantuta a plant (Cantua buxifolia), mayu river, hispanicized spelling Cantumayo) is a river in Peru located in the Arequipa Region, Caylloma Province, Coporaque District. It originates in the Ch'ila mountain range southeast of the mountain Mismi. Its direction is mainly to the south where it meets Colca River as a right affluent. The confluence is north of the town Coporaque.