|Visual proof for the (3, 4, 5) triangle as in the Zhoubi Suanjing 500–200 BC.|
Opuntia repens, roving pricklypear, is a species of cactus that is native to dry forests Puerto Rico and the Virgin Islands. It is a small shrub, growing up to 50 cm (20 in) tall, with yellow flowers and red fruit. Like its cousins, "jumping cholla" Opuntias of the Mojave, Sonoran, and Colorado deserts, it propagates by a segment dislodging after spines are caught in a large mammal's fur, whereby the segment is transported to another location. This is in addition to propagation by seed.
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