Radula australiana

Emerald to dark green mats, dioicous. Specialised asexual propagules absent. Leaves rotund, oblong, or elliptic with a triangular base, not falcate, 425–1650 μm long, 275–1500 μm wide, rounded at apex, continuous to imbricate, inserted at dorsal mid-line leaving no continuous row of cells uninterrupted by leaf insertions, not inserted at ventral mid-stem and leaving 2 rows of cells uninterrupted by leaf insertions, extending over dorsal side of stem often reaching or sometimes exceeding the opposite side of stem, attached to lobule by a straight to slightly bulging keel; lobe margin entire or crenulate, not descending below the level of the keel and forming a distinct notch at intersection, but instead often seamlessly continuing the curve or line of the keel; lobule quadrate, 1/6–1/4 of lobe area on leading shoot, 175–725 μm long, 225–650 μm wide, with obtuse or apiculate apex, free and extending half way or more over the ventral stem before attachment; leaf lobe cells rounded-polygonal, not forming a vitta, 9–25 μm long, 6–23 μm wide, thin-walled, with small triangular trigones, smooth, with 2–3 oil bodies; oil bodies light brown, granular, homogenous. Perianth 1500–4700 μm long, 875–1250 μm wide.