The appearance of Red Phoenix cactus is very similar to that of Xianyu cactus, but the thorns of Xianyu cactus are longer than that of Red Phoenix cactus.
Xianyu cactus belongs to Echinococcus genus, its plants are oblate to spherical, cylindrical, gray-green, with orange-yellow and funnel-shaped flowers, which are suitable for outdoor or potted viewing.