Leucoloma schwaneckeanum Brotherus 1901

Leucoloma schwaneckeanum (Hampe) E. G. Britton
Dicranum Schwaneckeanum Hampe, Linnaea 25: 361. 1853. Dicranum portoricense C. Mull. Hedwigia 37: 226. 1§98. Leucoloma portoricense Paris, Index Byrol. Suppl. 233. 1900.
Flowers and fruit unknown : plants in pale-green tufts, with often branching, erect-flexuous stems up to 4 cm. high: stem-leaves lanceolate-subulate, mostly falcate-secund with the point variously curved and twisted, up to 8 mm. long, subtubulose, on the back smooth or slightly papillose just below the apex, the slender point grooved and serrulate; cost a pale, excurrent, about 30 jx wide below and one eighth to one tenth the width of the lower part of the leaf; hyaline border extending from near the apex to the base, very narrow above, widest about three fourths down, becoming 10-12 cells wide, then mostly narrowing to the base; the very pale-green cells of the blade above from nearly square to roundish or short-oblong, about 4 fj. by 4-6 p, gradually lengthening below to mostly 6 ju wide by 12-25 lx long, with somewhat thickened walls not pitted or sinuous ; alar cells brownish to hyaline, often inflated and auriculate.
Type locality: Porto Rico. Distribution : Mountains of Porto Rico.