This genus of cacti originates from the elevated regions of the Andes and features a dense, white woolly covering along with elongated brown spines. In the spring, they produce trumpet-shaped flowers that are red in color.

Oreocereus

Oreocereus celsianus is a clump-forming cactus species that can reach heights of up to 3 meters. It features upright stems that branch from the base, characterized by prominent, warty ribs. The areoles are covered in grey wool and bear white hairs along with spines that range from yellow to reddish-brown. In summer, this cactus produces single, pale purplish-pink flowers, which can grow to 9 centimeters in length and are brownish-red on the exterior.

Oreocereus celsianus

Oreocereus doelzianus

Oreocereus hempelianus

Oreocereus hendriksenianus var. densilanatus

Oreocereus hendriksensis 'Gracilis'

Oreocereus leucotrichus

Oreocereus neocelsianus

Oreocereus pseudofossulatus is a gradually expanding cactus characterized by its cylindrical, ribbed stems adorned with spines and fine hairs. During the summer months, it produces pinkish-red flowers that emerge near the tips of the stems.

Oreocereus pseudofossulatus

Oreocereus ritteri

Oreocereus trollii is a columnar cactus that can reach heights of up to 50 cm. Its stems are cylindrical and ribbed, adorned with a thick layer of white wool. This wooly covering consists of radial spines that have adapted to shield the cactus from intense sunlight and chilly conditions. The central spines are brown and can grow to about 5 cm in length. During the summer, mature specimens may yield tubular flowers in a deep pink hue, measuring up to 4 cm long.