Micranthocereus

Morphological Summary

Columnar cacti endemic to Brazil, concentrated in the campos rupestres and caatinga of Bahia and Minas Gerais. They produce very small flowers (1–2 cm) in cephalium-like lateral zones along the stem — a diagnostic character of the genus. Several species produce pseudocephalia. Notably M. purpureus, one of the very rare cacti with truly purple-violet flowers.