Echinocereus poselgeri, also known as the dahlia cactus, is a species of Echinocereus. Echinocereus Poselgeri is a shrubby cactus with thin, long stems that produces gorgeous pink to purple flowers, It is native to Coahuila & southern Texas. Echinocereus Poselgeri - 10 Seeds Dahlia Cactus Amazing Pink Flowers Limited