The simple, blue-green leaves of Tricliceras laceratum are alternate without stalks (sessile) on the branched stems. The leaves are long, almost linear, narrowly oblong or ovate in shape, tapering very slightly to their tips. The whitish leaf midribs are conspicuous on the plant in picture, the margins curving up slightly or strongly, causing the upper surface sometimes to be channel-like.

There are occasional laterally protruding lobes scattered along the margins, also narrow, without any regularity or pattern to their presence. Otherwise the leaf margins are toothed, the leaf tips acutely pointed (Manning, 2009; Leistner, (Ed.) 2000; iNaturalist).