Nopal Cactus (Optunia Streptacantha) is a tree-like plant up to four meters high; its trunk reaches up to forty centimeters in diameter. The segments are elongated oval, compressed, dark green, twenty-five to thirty centimeters in in length. Tiny unicellular hairs with numerous downward hooks are red-brown, very short. Spines (in an amount of three to nine) are whitish, from five millimeters to six centimeters in length. The flowers are reddish-yellow or reddish-orange, up to nine centimeters in diameter. The fruits are round, up to five centimeters in diameter.