Lycium cooperi is a species of flowering plant in the nightshade family known by the common name peach thorn. It is native to the southwestern United States, where it grows in a variety of desert and mountain habitat types. This is a bushy, erect shrub approaching a maximum height of 4 metres (13 ft) with many rigid, thorny branches. The branches are lined thickly with fleshy oval or widely lance-shaped leaves each 1–3 centimetres (0.39–1.18 in) long and...