Eulychnia

A tree-like cactus of Chile, known as copao or rumpa. It produces large fruits with acid pulp. Extensive studies cover the seasonal flowering cycle, orientation of reproductive organs, population variation and seed fate after an animal eats the fruit.

A branched cactus of the Chilean coast with a strongly hairy lower flower region. The former Eulychnia saint-pieana is a synonym of this species in POWO. Field studies show the influence of lichens on stem microclimate, the northern position of flowers and the dependence of seed production on water availability.

Phil.

P.Klaassen

(F.Ritter) Lodé

A tree-like cactus of the coastal mountains of northern Chile. Living plants occupy rocky microhabitats on slopes accessible to fog, among other sites. Older population studies document separated sites and large differences in plant condition. Eulychnia aricensis and Eulychnia morromorenoensis are its synonyms in POWO.

A cactus endemic to the coastal Arequipa region in southern Peru. It forms branched stems, pink flowers opening in the day and fleshy fruits. DNA studies support the distinctness of this Peruvian lineage. Field assessment in 2017–2018 documents five populations and their differing threats.

(F.Ritter) Hoxey

P.C.Guerrero & Helmut Walter