Structure and identification
POWO accepts Acanthocereus atropurpureus. Adult stems have 3–4 low ribs with sinuate margins. The epidermis changes from dull green to pink or purple during the dry season. Areoles bear four small central spines. The flowers are nocturnal, cream to white. [González-Zamora et al. 2021, protologue, pp. 132–137, Plazi accessed 12.10.2026] [2-WWW]
Habitat and conservation
The original description places the species in seasonally dry forests of the Ayuquila-Armería basin. The authors reported a small known population and pressure from grazing and agriculture. They proposed the Critically Endangered category. [González-Zamora et al. 2021, protologue, pp. 132–137, Plazi accessed 12.10.2026]