Plants relatively large; shoots 2.0-4.0 mm wide. Leaves asymmetric, 1-2 mm long, alternate, dorsal base decurrent; apex 2-lobed, the sinus broad, obtuse or lunate, the lobes longly and finely acuminate, the acumen up to 8 cells long. Cells in mid-leaf 25-45 µm wide, thin-walled, trigones absent or minute. Underleaves completely free on both sides (not connate with leaf bases), the sinus narrow, V-shaped, the inner pair of lobes lanceolate, erecto-patent, the outer pair of lobes much smaller, patent or erecto-patent. Autoicous. Perianths trigonous, the keels with wings that usually have an apical tooth but are not otherwise laciniate; the lobes of the perianth mouth broadly triangular (approximately equilateral), shortly laciniate.
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