Echinocereus triglochidiatus Engelm.

Body solitary or clustering, cylindrical 5-40 cm, 5-15 cm wide with 5-12 distinct or indistinct ribs. Areoles wooly, circular 6-12 mm apart with 3-16 radial spines 1-7 cm long. Flowers remaining open at night, bright red, orange, salmon or pale pink 3-7 cm wide.

N Mexico, SW North America

Source: Forbes, S. (1997). Echinocereus. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Caryophyllanae
order      Caryophyllales
family       Cactaceae
genus        Echinocereus Engelm.