Alf 0004 - 0735 (Alf Ribeiro) Tags: alfribeiro biome brazil brazilian cereussp flower mandacaru nopeople pernambucostate petrolina rural water agreste arid botany branch bud caatinga cactaeae cacti cactus climate culture desert dry field flora garden grass green hot native nature northeast northeastern outdoor plant prickly sand saofranciscovalley semiarid sertao succulent sun thorn tree tropical vegetation wild