Smilax pulverulenta

Smilax pulverulenta, the downy carrionflower, is a North American species of plants native to the eastern and central United States. The plant is fairly common in the Ozarks, the Appalachians, and the Mid-Atlantic States, with isolated populations in Rhode Island, Minnesota, and Nebraska.

Description
Smilax pulverulenta is a climbing vine up to 250 cm (100 inches) tall, without prickles. Flowers are small and green; fruits dark blue to black, without the waxy coating common on other species in the genus.