Sclerocactus (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sclerocactus is a genus of cacti. It comprises about 15 species, the exact number depending on the authority. These species are very xerophytic. They are sometimes called ''fishhook cactus'' or ''little barrels''.Sclerocactus are ovoid to elongate cylindric, have rigid stems with tubercles that are generally coalesced into ribs, and are covered with spines that come out of the areoles. Most species have at least one hooked spine at each areole. Less often, species may not have hooks.