[2] Weberbauerocereus rauhii grows shrubby to tree-shaped with candelabra-like, upright shoots that have a diameter of 8 to 15 cm (3.1 to 5.9 in) and reaches heights of up to 6 meters.

The somewhat zygomorphic, slightly violet-brown fragrant flowers open at night and are up to 10 cm (3.9 in) long.

The flower tube is densely scaled with the outer bracts are reddish brown, the inner ones are white to pink or pinkish-brown.

[3] Weberbauerocereus rauhii is found in the Peruvian regions of Huancavelica, Ayacucho, Arequipa and Ica at altitudes of 500 to 2500 meters.

The specific epithet rauhii honors the German botanist Werner Rauh.