Eulychnia is a genus of tall, columnar cacti native to South America, especially Chile, known for their smooth, spiny bodies and large, beautiful white or yellow flowers that bloom in spring and summer. These resilient plants thrive in arid regions and often develop a distinctive, branched form. An interesting fact is that Eulychnia species are well-adapted to extreme desert conditions and produce striking flowers that attract pollinators, making them a captivating and hardy addition to cactus collections.