Smilax glauca is a woody vine

Vine

A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...

 in the family Smilacaceae

Smilacaceae

Smilacaceae, the greenbrier family, is a family of flowering plants. Up to some decades ago the genera now included in family Smilacaceae were often assigned to a more broadly defined family Liliaceae, but for the past twenty to thirty years most botanists have accepted Smilacaceae as a distinct...

, native to central and eastern portions of the United States. Thorny stems climb by means of tendrils. Leaves are notably gray-glaucous to whitish beneath. Commonly inhabiting wooded areas and fences and often found growing with other species of Smilax. The plants tend to be evergreen in the more southern part of the distribution. ) .