What type of category does Cassiope and Pediocactus have in common?
Pediocactus Pediocactus (Greek: πεδίον (pedion) means "plain", "flat", "field") is a genus of cacti. The genus comprises between 6 and 11 species, depending upon the authority. Species of this genus are referred to as hedgehog cacti, though that name is also applied to plants from the genera "Echinocereus" and "Echinopsis". Species may also be referred to as pincushion cacti, a common name which is also applied to other genera.
Stenocereus Stenocereus (Gk. stenos, narrow, L. cereus, candle) is a genus of columnar or tree-like cacti from the Baja California Peninsula and other parts of Mexico, Arizona in the United States, Colombia, Costa Rica, Guatemala, Venezuela and the ABC islands of the Dutch Caribbean. The genus has been enlarged by the addition of species from several other genera. A close relative is the peculiar chinoa or chende cactus, "Polaskia chende".