Cereus spegazzinii
Moonlight Cactus (Monvillea spegazzinii)
Origin and Habitat: Cereus spegazzinii is reported to occur in Argentina, in the provinces of Santa Fe, Santiago del Estero, Salta, Chaco, and Formosa. It also grows in Bolivia, Brazil, and Paraguay.
Altitude range: It can be found at elevations between 10 and 500 metres above sea level.
Habitat and Ecology: This cactus grows in the interior and edge of dry forests and is common and abundant throughout its range. It is listed as Least Concern because it is widely distributed, is common and locally abundant, and there are no major threats affecting it. It is also present in many protected areas.
Description: Cereus spegazzinii, more commonly known as Monvillea spegazzinii, is a slender shrubby cactus that has a similar form and habitat to the night-blooming cereus (Peniocereus greggii). It puts forth many basal shoots, soon becoming tillered.
Source: Encyclopedia of Cacti
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cereeae
Genus: Cereus
Species: C. spegazzinii
– Wikipedia.