Plants yellowish green. Stems reddish brown, to 4 mm long, branching once by subperigonial innovation or with multiple perigonia, with reddish brown rhizoids; hyalodermis faint (usually only a thin outer wall of an otherwise thick-walled epidermal cell). Leaves erect, ovate-lanceolate, 0.7–1.7 (–2.2) mm long, 0.2–0.4 (–0.6) mm wide, concave to subtubulose, gradually or abruptly tapered to a subulate apex; costa 25–37 µm wide near the base, disappearing in the acumen; margins entire. Upper laminal cells oblong, 25–70 × 12–15 µm, somewhat longer (to c. 105 µm), laxer and more hexagonal below; marginal cells not differentiated; apical cells 30–48 µm long; alar cells not differentiated.

Perigonia single or multiple. Calyptra cucullate, long-rostrate. Setae 2.5–9.0 mm long, twisted to the left throughout, reddish brown, weakly hygroscopic. Capsules erect, symmetrical, oblong-pyriform, not or very weakly constricted below the mouth when dry, 1.0–1.3 mm long, 0.5–0.7 mm wide, with a gradually tapered irregularly wrinkled neck c. half the capsule length, reddish brown at maturity; mouth c. 3/4 the diameter of the capsule (at dehiscence), transverse, gymnostomous; exothecial cells c. 30–60 µm long, 3–6:1, with thick cuneate anticlinal walls, 6–8 rows oblate and more pigmented at the mouth; operculum plano-convex, 325–450 µm diam. Peristome absent. Spores 30–36 µm, verrucate-bullate and usually irregularly wrinkled, usually with an obvious trilete scar.

Entosthodon productus Mitt., in J.D.Hooker & W.M.Wilson, Fl. Tasman. 2: 197 (1860); Funaria producta (Mitt.) Broth., in H.G.A.Engler & K.A.E.Prantl, Nat. Pflanzenfam. 1(3): 522 (1903). Type: behind Cummings Head, Western Mtns, Tas., Archer; holotype: NY-Mitten; isotype: BM-Hooker.

Entosthodon minuticaulis Müll.Hal. ex Geh., Rev. Bryol. 24: 72 (1897); Funaria minuticaulis (Müll.Hal. ex Geh.) Watts & Whitel., Proc. Linn. Soc. New South Wales, Suppl. 30: 115 (1906). Type: Moyston, Vic., D.Sullivan; H-BR.

Funaria perpusilla Broth., Proc. Linn. Soc. New South Wales 41: 583 (1916). Type: Heyington, Vic., W.W.Watts 196; holo: H-BR.

W.A.: Lesmurdie, D.G.Catcheside 73.202.

S.A.: Bellevue Heights, D.G.Catcheside 79.134.

Vic.: Nigretta Falls, Hamilton, D.G.Catcheside 77.143.

Tas.: Blackmans Bay, W.A.Weymouth 247.

Entosthodon productus is closely allied to E. jamesonii (Taylor) Mitt. of the Andes, Central America and Malesia (Fife, 1987), and it could be treated as a subspecies of the latter. However, because of its consistently smaller stature (leaf dimensions, seta length and capsule size) and geographical distribution, E. productus is retained here.

A.J.Fife & R.D.Seppelt (2012), Australian Mosses Online 67. Funariaceae. Australian Biological Resources Study, Canberra. Version 2 October 2012.