This South American species has two subspecies, and this one, as the name indicates, is from Uruguay. It is a tree-like species with large, gray-green stems that usually are spineless on mature plants. The variegation is white to yellow streaks on the typically light green stems. The flowers are large with pinkish-red petal tips. Cultivar Fairy Castle has numerous thin stems arising to resemble, oh you know. These plants are rooted cuttings in 4-inch pots.