Smilax glauca, the cat greenbriar[3] or catbriar, is a woody vine in the family Smilacaceae.

It is native to central and eastern portions of the United States as well as Mexico, where it is a common and conspicuous part of the forest vegetation.

[6][7][8] Smilax glauca is a woody vine that succeeds in most soils in sun and in semi-shaded areas.

It is a dioecious plant; an evergreen climber that can grow to 5 meters, it flowers in June and is leafy all year.

[18] Smilax glauca increases in importance after fire in upland southern pine forests.

The stem prickles have been rubbed on the skin to act as a counterirritant to relieve pain and muscle cramps.