Arrojadoa

Morphological Summary

Genus of slender, bamboo-like columnar cacti from the semi-arid caatinga of northeastern Brazil, with 5–6 accepted species. Their stems produce at the end of each growing season a pseudocephalium — an annular crown of spines and woolly hairs — from which the tubular flowers in red to deep pink emerge. They inhabit the caatinga and rupestrian fields of northeastern Brazil. Named in honor of Brazilian engineer and botanist Miguel Arrojado Ribeiro Lisboa (1872–1932).