光滑菝葜（学名：Smilax glabra），又名光叶菝葜、冷饭藤、禹余粮，为菝葜科菝契属下的一个种。

Smilax glabra, the Chinaroot, tufuling (土茯苓) or sarsaparilla, is a plant species in the genus Smilax. It is native to China, the Himalayas, and Indochina.

Smilax glabra is used in Chinese herbology. It is also a key ingredient in the Chinese medical dessert guīlínggāo, which makes use of its property to set certain kinds of jelly.