Oreocereus

Oreocereus contains a small number of columnar cacti coming from high altitude areas in the Andes mountains of South-America. They vary in shape from prostrate clusters to 10 feet tall columnar species (3 m). All the species are covered with an abundant hair like material that protects them from the sunlight, and probably also from abrupt temperature variations. The name Oreocereus comes from the Greek for 'mountain Cereus'. Mature cacti produce showy light colored flowers in summer. The Oreocereus are generally propagated from seeds. Species and varieties Oreocereus celsianus (Old Man of the Andes) Oreocereus celsianus var. fossulatus Oreocereus doelzianus Oreocereus doelzianus var. sericatus Oreocereus hempelianus (Achacaño) Oreocereus leucotrichus Oreocereus pseudofossulatus Oreocereus ritteri Oreocereus tacnaensis Oreocereus trollii (Old Man of the Mountain) Oreocereus variicolor Oreocereus australis synonym of Oreocereus hempelianus (Achacaño) Oreocereus bruennowii synonym of Oreocereus trollii (Old Man of the Mountain) Oreocereus celsianus var. bruennowii synonym of Oreocereus trollii (Old Man of the Mountain) Oreocereus celsianus var. foveolatus synonym of Oreocereus celsianus var. fossulatus Oreocereus fossulatus synonym of Oreocereus celsianus var. fossulatus Oreocereus hendriksenianus synonym of Oreocereus leucotrichus Oreocereus irigoyenii synonym of Oreocereus trollii (Old Man of the Mountain) Oreocereus knizei synonym of Oreocereus variicolor Oreocereus lanatus synonym of Espostoa lanata (Peruvian Old Man Cactus) Oreocereus maximus synonym of Oreocereus celsianus (Old Man of the Andes) Oreocereus neocelsianus synonym of Oreocereus celsianus (Old Man of the Andes) Oreocereus piscoensis synonym of Cleistocactus pachycladus Oreocereus rettigii synonym of Oreocereus hempelianus (Achacaño)

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