Micracantocereus

Micracantocereus is a genus of cacti belonging to the tribe Pachycereeae. These plants are native to Brazil, primarily found in the Cerrado region. The genus is characterized by its small to medium-sized, columnar or clumping stems, which are often highly ribbed and covered with numerous spines.

The name Micracantocereus is derived from Greek and Latin words, roughly translating to "small-spined cereus," referring to the delicate nature of their spines compared to some other large cacti. Species within this genus typically exhibit nocturnal or crepuscular flowering. The flowers are usually funnel-shaped and can vary in color from white to pink or reddish hues.

Micracantocereus species are adapted to arid and semi-arid environments, often growing in sandy or rocky soils. Their growth habit can be solitary or form dense clusters. Due to their specific habitat requirements and slow growth, some Micracantocereus species are considered vulnerable or endangered in their natural range.

Cultivation of Micracantocereus requires well-draining soil, bright light, and infrequent watering, mimicking their native arid conditions. They are generally considered slow-growing and can be challenging to propagate, making them less common in ornamental collections compared to more robust cactus species. Conservation efforts are important to protect wild populations from habitat loss and illegal collection.