Parodia scopa is a silvery spined cactus often clustering with showy yellow flowers. The stems are almost hidden by soft tufts of bristly spines somewhat similar to small brushes. The mixture of white and red-brown spines, varying from plant to plant.
A cluster of satiny, bright yellow flowers spring in the upper part of the stem forming a ring, The are 2-4 cm long and 3,5-4,5 cm in diameter. , Pistil with about 10, rayed, bright crimson stigma lobes. Tube short. Scales on the ovary woolly with brown bristles.
