Acanthocalycium

Taxobox
name = "Acanthocalycium"

---

image_width = 240px
image_caption = "Acanthocalycium spiniflorum"
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Caryophyllales
familia = Cactaceae
subfamilia = Cactoideae
tribus = Trichocereeae
genus = "Acanthocalycium"
genus_authority = Backeb., 1935
subdivision_ranks = Species
subdivision = "Acanthocalycium ferrarii"
"Acanthocalycium klimpelianum"
"Acanthocalycium spiniflorum"
etc.

"Acanthocalycium" is a genus of cactus consisting of three species from Argentina. The taxon name comes from Greek "akantha" (meaning "prickly") and "kalyx" (meaning "buds"), which refers to the spines on the floral tubes.

These plants are globose to elongate, with numerous ribs on the spiny stems. Flowers range from white to pink to red and open during the day.

Taxonomy

"Spinicalycium" Fric (nom. inval.) has been brought into synonymy with this genus. Besides, the genus "Acanthocalycium" has been periodically included in the genus "Echinopsis".

References

* Edward F. Anderson, "The Cactus Family" (Timber Press, 2001), pp. 105-106