Common Greenbriar (Smilax rotundifolia), also known as Common Greenbrier, is a common woody vine native to the Eastern United States . The leaves are glossy green, petioled, alternate, and circular to heart-shaped. They are generally 5-13 cm long. Common greenbriar climbs other plants using green tendrils growing out of the petioles .
The stems are round, green and have sharp prickles growing on them. The prickles can be damaging if one gets entangled in a patch of them. The flowers are greenish, and are seen from April to August, the fruit they produce are bluish black berries that become ripe in September .
The young shoots of common greenbriar are reported to be excellent cooked like asparagus . The young leaves and tendrils can be prepared like spinach or added directly to salads . The roots have natural gelling agent in them that can be extracted and used as a thickening agent .