Armatocereus

A shrub or tree from Ecuador and Peru, with dark green, constricted stems. A comparative key separates mature plants from Armatocereus godingianus primarily by floral bract and areole structure and the range of central-spine lengths.

(K.Schum.) F.Ritter

A tree-like cactus from Ecuador within which POWO recognizes the short-spined subspecies brevispinus. The account of this subspecies describes dark green, constricted stems, white flowers and large green fruits, as well as a documented herbarium specimen from northern Peru.

A tree-like cactus with a shallow, spreading lateral root system. Long-term sap-flow records from an Ecuadorian dry forest showed a rapid root response to small rainfall events and water uptake both at night and during the day.

A tree-like cactus whose Áncash population was studied under the former name Armatocereus mataranus subsp. ancashensis. Seedlings and young stems from this population provided data on germination, chromosomes and repeated DNA replication in stem cells.

Rauh & Backeb.

A Peruvian cactus whose fruits are a documented food source for the parrot Forpus xanthops in the seasonally dry forest of the Marañón valley. The observation covers the bird consuming fruit pulp and seeds.