Strophocactus sicariguensis

Strophocactus sicariguensis, synonym Pseudoacanthocereus sicariguensis, is a species of plant in the family Cactaceae. It is native to Colombia and Venezuela. It has often sprawling thin stems and white funnel-shaped flowers that open at night.
Description.
"Strophocactus sicariguensis" grows as a shrub, initially upright and later sprawling. It branches freely from the base. The thin stems are up to long and across and have 2–5 ribs bearing areoles with spines up to long. The white funnel-shaped flowers open at night and are up to long.
Taxonomy.
"Strophocactus sicariguensis" was first described, as "Acanthocereus sicariguensis", in 1947. It was transferred to the genus "Pseudoacanthocereus" as "Pseudoacanthocereus sicariguensis" by Nigel P. Taylor in 1992, a placement still accepted by some sources . A molecular phylogenetic study of the Hylocereeae by Korotkova et al. published in 2017 showed that "Pseudoacanthocereus sicariguensis" formed a clade with "Strophocactus wittii" and "Pseudoacanthocereus brasiliensis" (the only other species placed in "Pseudoacanthocereus"):
Accordingly, both species of "Pseudoacanthocereus" were transferred to "Strophocactus".
Distribution.
"Strophocactus sicariguensis" is native to Colombia and Venezuela, in particular around the Maracaibo Basin.