Pilosocereus royenii
Pilosocereus royenii is a name which has been used in different senses for a species of cactus. In the past, it has been treated as a distinct species with a wide distribution in the Caribbean and Mexico., it is not accepted by Plants of [the World Online].
- Populations in Puerto Rico and the Virgin Islands that have been treated as the variety armatus of Pilosocereus royenii are considered to be Pilosocereus armatus A.R.Franck.
- Populations in southeast Cuba that have been treated as the variety brooksianus of Pilosocereus royenii are considered to be Pilosocereus brooksianus Byles & G.D.Rowley
- Populations in Mexico that have been called by this name are considered to be Pilosocereus gaumeri Backeb.
- Pilosocereus royenii has been treated as a possible synonym of Pilosocereus polygonus Byles & G.D.Rowley, e.g. by Plants of the [World Online].