This shrubby climber has opposite, leathery leaves, that often occur in threes. Leaves are up to 12 cm long, and have distinct veins on either side of the midvein. The leaves look rather similar to Smilax australis, but White Supplejack has no prickles on its young stems and Smilax australis has alternate leaves. Old branches can be quite prickly. The short leaf stalk is without tendrils and usually twisted. The greenish-white flowers occur in spikes in the forks of the leaves. The rarely seen fruit is a round red berry.
Snowy River, VIC to northern QLD; also in New Guinea