Opuntia also native to sandy coastal beach scrub environments of the East Coast from Florida to southern Connecticut ("Opuntia humifusa"). "Opuntia" species are the most cold-tolerant of the lowland cacti, extending into western and southern Canada; one subspecies, "O. fragilis" var. "fragilis", has been found growing along the Beatton River in central British Columbia, southwest of Cecil Lake at 56° 17’ N latitude and 120° 39’ W longitude. Prickly pears also produce a fruit, commonly eaten in Mexico and in the Mediterranean region, known as "tuna"; it also is used to make "aguas frescas". The fruit can be red, wine-red, green,
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