[2] Oreocereus pseudofossulatus grows shrubby, branches irregularly in the lower half and reaches heights of up to 2 meters.

The single, conspicuous central spine, 2 to 5 cm (0.79 to 1.97 in) long, is initially protruding and later directed slightly downwards.

The tubular, crooked-edged, greenish pink to bluish red flowers appear near the tips of the shoots and are up to 9 cm (3.5 in) long.

The ellipsoidal, greenish yellow to brownish red fruits are fleshy and do not tear.

The nomenclaturally correct first description was made in 1991 by David Richard Hunt.