Hatiora cylindrica is a species of often epiphytic cactus in the tribe Rhipsalideae within the subfamily Cactoideae.

It is native to east Brazil, where it grows in a variety of habitats, including moist forest, dunes and coastal rocks.

[2][3] Molecular phylogenetic studies have confirmed its placement in the genus and in the tribe Rhipsalideae, and also shown that it is closely related to H. salicornioides (which may include some other distinct species).

It grows as an epiphyte, in the ground and probably as a lithophyte in a variety of habitats, including humid forests, sand dunes and coastal rocks.

The main threat was a decline in its habitat caused by deforestation as a result of expanding tourism, agriculture and development.