Macromitrium stratosum

Macromitrium stratosum Mitt. Jour
I/inn. Soc. 12: 199. 1869.
Macromitrium cacuminicolum C. Mull. Bull. Herb. Boiss. 5: 559. 1897. Macromitrium Acunae Ther. Mem. Soc. Cub. Hist. Nat. 14: 353. 1940.
Plants densely cespitose; primary stems densely branching; secondary stems short, 1-2 cm. long, rarely longer, more or less branched, densely foliate; leaves appressed and incurvedcontorted when dry, erect-open when moist, about 2 mm. long, lanceolate, narrowly acute to slenderly acuminate, carina te, somewhat plicate, the margins plane and entire; costa percurrent to shortly excurrent; upper leaf -cells subcircular, the lumen about 5 M in diameter, or shortoblong, elongate near the costa and at the extreme apex, smallest and often transversely elongate at the upper margins, all very incrassate, gradually elongate toward the narrowly linear basal cells which have no tubercles and thin transverse walls; perichaetial leaves broader, abruptly narrowed to a hair-point consisting of the excurrent costa; monoicous; seta up to 16 mm. long; capsules obovoid, the neck short, the urn including the neck about 1.6 mm. long, somewhat plicate and narrowed at the mouth when dry; operculum long-rostrate, shorter than the urn; peristome single, up to 0.18 mm. long, strongly papillose; spores finely papillose, up to 45 n in diameter.
Type locality: Jamaica (Maxwell; type from herb. Mitten at the N. Y. Bot. Gard. examined). Distribution: On twigs and branches of trees; Jamaica; Cuba (Maxon 9984; Orcutt 2863;