Opuntia rastrera to help. The species can reproduce either vegetatively or by seed. In fact, the nature of the habitat determines which is more common, with sexual reproduction dominating in grasslands and vegetative propagation dominating in scrublands. Opuntia rastrera Opuntia rastrera is a prickly pear which grows in the Mexican state of San Luis Potosí. It is known in Spanish as cuija, although that name can also refer to other cactuses such as "Brasiliopuntia". "Opuntia rastrera" can be found in bajada, hill-piedmont, and interdune habitats in locations such as the Mapimi biosphere reserve, where it is sometimes the most common cactus in
Opuntia readily between species. This can make classification difficult, yielding a reticulate phylogeny where different species come together in hybridization. Also, not all species listed here may actually belong in this genus, meaning that "Opuntia" is not a monophyletic group. "Opuntia" also has a tendency for polyploidy. The ancestral diploid state was 2n=22, but many species are hexaploid (6n = 66) or octaploid (8n = 88). Chollas, now recognized to belong to the distinct genus "Cylindropuntia", are distinguished by having cylindrical, rather than flattened, stem segments with large barbed spines. The stem joints of several species, notably the jumping cholla ("Cylindropuntia