Arequipa

Britton & Rose, 1922

Species Guides

Arequipa turbatella

Arequipa is a of cacti in the Cactaceae, established by Britton & Rose in 1922. The genus is named after the city of Arequipa in southern Peru, a major center for cactus diversity in the Andes. in this genus are characterized by their columnar or shrubby growth habit and are native to arid and semi-arid regions of southern Peru and northern Chile. The genus has been subject to taxonomic revision, with some species transferred to related genera such as Weberbauerocereus.

Pronunciation

How to pronounce Arequipa: /ˌa.reˈki.pa/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Habitat

Arid and semi-arid regions of the Andean foothills and coastal deserts of southern Peru and northern Chile. The occurs in rocky slopes, quebradas (dry ravines), and desert scrub vegetation at elevations ranging from near sea level to approximately 2,000 meters.

Distribution

Southern Peru (Arequipa, Moquegua, and Tacna departments) and northern Chile (Tarapacá and Antofagasta regions). The type locality is the Arequipa region of Peru.

Ecological Role

Arequipa cacti function as nurse plants in their native desert , providing shade, moisture retention, and substrate for seedling establishment of other plant . The stems and fruits serve as water and food sources for desert fauna including birds, insects, and small mammals.

Human Relevance

Arequipa are occasionally cultivated as ornamental cacti in collections. The is of biogeographic interest due to its restricted distribution in a region of high cactus . The city of Arequipa, for which the genus is named, is a UNESCO World Heritage Site and serves as a gateway for exploration of southern Peruvian deserts.

Similar Taxa

WeberbauerocereusClosely related columnar cacti from the same region; some Arequipa have been transferred to this in recent taxonomic treatments based on floral and fruit characteristics.
CleistocactusShares tubular flowers and similar growth habit; distinguished by Arequipa's typically more robust stems and different geographic distribution centered on the Arequipa region.
EspostoaSimilar columnar habit with ribbed stems; Arequipa lacks the dense hair-like spines (pseudocephalium) characteristic of Espostoa and has a more southerly distribution.

More Details

Taxonomic History

The Arequipa was established by Nathaniel Lord Britton and Joseph Nelson Rose in their monograph 'The Cactaceae' (1922), with Arequipa leucotricha as the type . The name honors the Peruvian city of Arequipa, near where the was collected. The genus has undergone repeated revision, with some authors subsuming it into Weberbauerocereus or recognizing it as distinct based on stem and flower .

Conservation Context

destruction from urban expansion of the city of Arequipa and agricultural development in the Majes and Siguas valleys poses threats to wild . Some occur in the Reserva Nacional de Salinas y Aguada Blanca, providing protected status.