Cereeae

Cereeae are a tribe of cactus belonging to the Cactoideae subfamily.
References.
Soffiatti, P.; Angyalossy, V. Anatomy of Brazilian Cereeae (subfamily Cactoideae, Cactaceae): "Arrojadoa" Britton & Rose, "Stephanocereus" A. Berger and "Brasilicereus" Backeberg. Acta Botanica Brasilica, v. 21, n. 4, 2007.