Tu Fu Ling, Glabrous Greenbrier (Smilax Glabra) is a climbing shrub. Tuberous roots are with obvious nodules and many fibrous roots. Stems are with no thorns. Leaves are alternate, leathery, lanceolate to elliptic-lanceolate, 6 to 20cm long, 1.2 to 5cm wide, and with acuminate apex, rounded base, and entire margin. Flowers are dioecious. The flowers are small, white, and about 4mm in diameter. Berry is red in color, spherical, and 6 to 8mm in diameter. Blooming period is from July to August and fruiting time is from September to October.