What does "smilax" mean?

Smilax: (a) A genus of perennial climbing plants, usually with a prickly woody stem; green brier, or cat brier. The rootstocks of certain species are the source of the medicine called sarsaparilla. (b) A delicate trailing plant (Myrsiphyllum asparagoides) much used for decoration. It is a native of the Cape of Good Hope.