Saw greenbrier belongs to Smilacaceae (Catbrier family). It is a deciduous woody vine that is native to south-east and south-central USA and north-east Mexico. This vine occurs in forests, old fields or roadsides and can reach 6-9 m long. The stems are usually 4-angled or ridged with stiff spines. The leaves are deltoid or ovate, dark green, sometimes covered with light green splotches. The numerous, small, greenish flowers bloom in spring. The fruits ripen black in fall.