Only a few species of cacti are really easy to identify. The most obvious identifying signs are the shape, number and arrangement of the spines, the number and shape of ribs and warts, and the colour of flowers. Flowers of albino cacti are frequently deformed, quality of spines sometimes depend of the stock. We can depend on the origin of the seeds, if we produce them ourselves. The hybrids found at home or in nature cause the most problems. Albino specimens are significant, even as hybrids.