Acanthocalycium

Acanthocalycium
Acanthocalycium spiniflorum
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Core eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Tribe:	Trichocereeae
Genus:	Acanthocalycium Backeb.
Species
Acanthocalycium aurantiacum Acanthocalycium ferrarii Acanthocalycium glaucum Acanthocalycium klimpelianum Acanthocalycium peitscherianum Acanthocalycium spiniflorum Acanthocalycium violaceum etc.

Acanthocalycium is a genus of cactus consisting of several 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
• Willy Cullmann, Erich Götz & Gerhard Gröner, The Encyclopedia of Cacti (Alphabooks, 1086). pp. 124-125

The flower of acanthocalycium spiniflorum