Trichocereus/Echinopsis

Trichocereus (now often classified under the genus Echinopsis) is a genus of columnar cacti native to South America, particularly in regions of Argentina, Bolivia, Chile, Peru, and Ecuador. These cacti are known for their tall, cylindrical growth and are often large, with some species reaching heights of up to 10 meters (33 feet) in the wild. The genus includes species like Trichocereus pachanoi (San Pedro cactus), Trichocereus peruvianus (Peruvian torch cactus), and Trichocereus bridgesii.

Characterized by ribbed, green to bluish-green stems and prominent spines, Trichocereus/Echinopsis species often produce large, showy flowers in colors ranging from white and yellow to pink and red. The flowers typically bloom at night and are short-lived, with some species having sweetly fragrant blooms to attract nocturnal pollinators like moths.

Many species within this genus, such as Trichocereus pachanoi and Trichocereus peruvianus, are culturally significant due to their traditional use in shamanic rituals. These species contain the psychoactive alkaloid mescaline, similar to Lophophora williamsii (peyote), and have been used in Andean spiritual practices for centuries.

Trichocereus/Echinopsis cacti are hardy and drought-tolerant, making them popular among collectors and gardeners. They can thrive in both outdoor desert landscapes and as potted plants in well-draining soil with plenty of sunlight.