Smilax illinoensis
Smilax illinoensis , the Illinois greenbrier, is a North American species of plants found only in the United States and Canada. It is native primarily to the Great Lakes Region with a few populations further south in Missouri and in the Ohio Valley.
Smilax illinoensis is an upright, unbranched herb up to 100 cm tall, with no prickles. It grows in woods and thickets.