#conservation status
- Arthrocereus microsphaericus — The scientific name of a rare and endangered cactus species belonging to the Arthrocereus genus, found exclusively in the mountainous regions of eastern Brazil. The plant is structurally recognized by its very small globular or cylindrical segments (hence the name 'microsphaericus'), with reduced spines, forming compact clumps at soil level and bearing major ecological importance in biodiversity conservation.