Stems erect, reclining, or clambering, sometimes epiphytic and vinelike, to 4 m; ribs 9-10. Spines 7-9 per areole, 1-2.5 cm, yellow tipped or completely yellowish when young. Flowers: flower tube 10-15 cm, prominently ridged; scales turgid at base, with axillary tufts of hairs; hairs, white, soft and silky, flexible, 6-10 mm; buds with white hairs. Fruits dull red at maturity, depressed-spheric, 40-60 mm diam.
|Simpson’s prickly apple, Simpson’s applecactus, queen-of-the-night|