Espostoa
Espostoa is a genus of columnar cacti native to the Andes Mountains of southern Ecuador and Peru. These cacti are characterized by their woolly covering, which gives them a distinctive appearance and protects them from the harsh Andean sun and cold temperatures.
Description:
Espostoa cacti are typically tall and columnar, growing to several meters in height. Their stems are ribbed, and the ribs are covered in areoles from which spines and the characteristic woolly hair emerge. The wool can be white, yellowish, or brownish in color, depending on the species and age of the plant.
Flowers:
Espostoa cacti flower at night, producing tubular, white or pinkish flowers from lateral cephalium-like structures that develop on one side of the stem as the plant matures. These flowers are pollinated by moths and bats.
Distribution and Habitat:
Espostoa species are found in arid and semi-arid regions of the Andes Mountains, typically at elevations between 1,500 and 3,500 meters. They grow on rocky slopes and hillsides, often in association with other cacti and succulents.
Cultivation:
Espostoa cacti are cultivated as ornamental plants, prized for their unique appearance. They require well-draining soil, plenty of sunlight, and protection from frost. Propagation is typically done by seed or cuttings.
Conservation:
Some species of Espostoa are threatened by habitat loss and over-collection. Conservation efforts are underway to protect these iconic cacti in their natural habitats.
Selected Species:
- Espostoa lanata
- Espostoa melanostele
- Espostoa guentheri
- Espostoa ritteri
- Espostoa senilis