Identificaciones de johnwalter

The leaves are mostly 1.1-1.2 mm long, bladdery at the base, loosely embracing the stem. The vaginant lamina apex tapers acutely to the leaf costa at a point about 2/3 of the way up the leaf.

I initially identified this observation as Fissidens megalotis, intermixed with F. bifrons. However, I had misgivings. I sought the sage advice of John Walter, who rightly questioned why the vaginate lamina's limbidium didn't seem to be intramarginal.

Prompted by that, I referred the matter to bryologist Daniel Ohlsen at the National Herbarium of Victoria, who checked specimens determined by Ilma Stone and concluded that my F. megalotis is actually just an alternative guise of the F. bifrons that I'd already identified.

At the time of writing, iNaturalist is treating F. bifrons as a synonym of F. pygmaeus, contrary to taxonomic authorities in Australasia.

The subject of this record is the species at left. I initially thought it was a Fossombronia (like the species at right, subject of a separate record) and I'm not sure it's Lethocolea pansa. They grow on silty, denuded ground in this reserve, with Fissidens bifrons and Campylopus ?clavatus. The rulings are mm.

Growing over other bryophytes (e.g. Fissidens asplenioides), rocks and logs in a fern gully. Associated species include Cyathea australis, Lastreopsis acuminata, Blechnum nudum, Achrophyllum dentatum, Hypnodendrum vitiensis.

I wish iNat allowed members to indicate the confidence they have in their identifications. I have some misgivings here but I can't come up with an alternative ID to accommodate the fimbriate underleaves and the mostly 4 -toothed upper leaves.