Goebelobryum

Terrestrial, dioicous. Asexual reproduction absent. Stems rarely branched, with two ranks of lateral leaves and a third rank of minute underleaves sometimes intermittently present; branches when present emerging from main stem near lateral leaves or underleaves (not in Victoria) and with a collar of tissue at base. Lateral leaves ovate or rotundate to reniform in outline, often bilobed but obscured by 7–12 marginal cilia, or rarely entire, alternate, erect from substrate or rarely spreading parallel to substrate, imbricate, usually concave adaxially and undulate to crispate, green, becoming reddish or purple (not in Victoria) in illuminated sites. Underleaves much smaller than lateral leaves and narrower than stem, irregularly lobed, with unlobed base to around 5 cells long and wide, with slime papillae around margin, free or connate to one lateral leaf. Leaf cells polygonal, becoming rectangular to oblong at margins, smooth or almost so, thin-walled, without (not in Victoria) or with distinct trigones, with 1–5 oil bodies; oil bodies colourless, brownish or bluish (not in Victoria), ellipsoid, finely granular-botryoidal. Rhizoids in tufts or scattered along abaxial stem, hyaline. Androecia on main stem, with 4–16 bracts, each bearing 2–10 antheridia; bracts similar size or distinctly smaller (not in Victoria) to normal lateral leaves. Sporophyte surrounded by a pendent marsupium, without a perianth; marsupium long-cylindric, becoming 1.5–2.5 cm long, entirely subterranean, covered with rhizoids, with a root-cap-like meristematic apex where sometimes clavately swollen. Capsule ellipsoid to cylindric-ellipsoid, 4-stratose, not rostrate.