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 engelmannii (state) to the Tamaulipan matorral in Chihuahua (state), in Mexico. In the Sonoran Desert, terminal pads face predominantly east-west, so as to maximize the absorption of solar radiation during summer rains. Although found occasionally in the Mojave Desert, it tends to be replaced by "Opuntia basilaris", which does not need the summer rain. The overall form of "Opuntia engelmannii" is generally shrubby, with dense clumps up to high, usually with no apparent trunk. The pads are green (rarely blue-green), obovate to round, about 15–30 cm long and 12–20 cm wide. The glochids are yellow initially, then brown with age. Spines