Cryptogamie, Bryologie 36: 344-346, fig. 1-15 (2015).

TYPE. — New Caledonia. North Province, Hienghène, summit of Mt Panié, c. 1640 m, 9.X.2012, Larraín 35846 (holo-, PC [PC 0167650]!; iso-, NOU! KLU, F, CONC, NY, S).

ILLUSTRATIONS AND DESCRIPTION. — Thouvenot & Yong (2015); Müller et al. (2016).

DISTRIBUTION IN NEW CALEDONIA. — So far only known from Mt Panié, the highest summit in the country.

TOTAL RANGE. — Endemic to North Province of New Caledonia.

SELECTED SPECIMENS. — New Caledonia, Province Nord, Mt Panié, along the hiking trail from RPN3 to the summit, c. 1200 m, 13.IX.2001, F. Müller NC98 & NC202 (DR).

Macromitrium larrainii is well characterised by:1) long branches up to 25 mm long; 2) lanceolate branch leaves distinctively slender, laminae widest near base, very narrow and asymmetrical above; 3) a very shaggy habit due to the long, thin aristae up to 1 mm long and excurrent costae of the branch leaves irregularly arranged; 4) cells smooth throughout the leaves; 5) upper leaf cells irregular in shape and size and basal ones linear and evenly thick-walled, with straight lumina; and 6) setae 8-10 mm long.

A B C F E D G H I

Epiphyte growing on barks in rain and cloud forests and scrublands, at higher altitudes, this species is candidate to micro-endemic status since it is only known from two collecting places relatively close one from the other, in the northernmost part of the Central Range.