Like H. alstonii but plant up to 0.8 m tall, stems brown-green with weak spines, flowers 1-3, corolla campanulate, 16-20 mm diam., inside purple-black and densely papillate, tube cupular, lobes 4-6 x 6-7 mm, outer corona lobes spreading to suberect.
Spiny, cactus-like leafless succulent to 80 cm, with 21-34-angled stems; sap clear. Flowers 16-20 mm diam., dark purplish to pinkish brown, foul-smelling.
It is a succulent herb.