Dioicous, medium sized, prostrate on bark and rocks. Stem to 4 cm long, usually regularly branched. Leaves imbricate, covering the stem but not or very little exceeding the same, subrotund, apex rounded, abruptly apiculate, apiculus spiniform. Branches with smaller leaves, about 1/2 the size of the stem-leaves. Cells in the centre of the lobes about 18 µ, basal cells up to 27 µ, trigones large, walls thin. Oil bodies 2-3 per cell, 4 x 4-3-4 x 8-10 µ, composed of 1 µ large drops. Lobule distant from the stem, claviform-obovate, diverging in about 70° from the stem, free except a short portion at the attachment, stylus 2 cells broad. In the smallest branches the leaves consist of either only a lobule or a lobule and a small lanceolate dorsal lobe. Amphigastria bilobed to 1/2, with 2-3 large teeth in the lateral margin of the lobe. Androecia globose, rare. Perianth also rare, bracts with long lanceolate, serrate lobes and a large ciliate bracteole.
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