Shrub or small tree, spinous. Leaves 55-110 x 30-75 mm, ovate-elliptic, crenate, apex obtuse. Leaf imperfectly jointed to the petiole; petiole inconspicuously winged. Flowers 1-few, in racemes. Petals purplish on the outside, fleshy. Stamens 25-40. Fruit 6-10 cm in diameter, oblong mamillate; rind cadmium-yellow when ripe, pulp very acid.