Vine-like cactus with ± scrambling habit. Stem internodes flattened, dark green. Flowers nocturnal, very fragrant, white at least inside corolla 22-24 cm long; corolla tube 15-16 cm long, pale green; petals 7-8 cm long (outermost whorl) x c. 7 mm wide, pale green outside, white inside; other petals 6-7 cm long x 6-7 mm wide, white. Stamens mostly 3.5-4 cm long, white. Style pink, exserted 4-5 cm; stigma c. 1 cm long, creamy-yellow. Fairly common.