Macromitrium fulgescens E. B. Bartram ex Grout 1944

Macromitrium fulgescens E. Bartr. ; Grout, Bryologist 47: 12. 1944.
Macromitrium fuscescens E. Bartr. Contr. U. S. Nat. Herb. 26: 89. 1928. Not M. fuscescens Schwaegr. 1827.
Primary stems creeping, rather rough with old abraded leaves; secondary stems erect, densely tufted, 5-6 cm. long, dark brown below, yellow-green above, branched, scarcely radiculose; leaves rather abruptly and widely flexuous-spreading from a short, suberect, slightly plicate base when moist, crisped and contorted when dry, 7-10 mm. long, linear-lanceolate, gradually long-filiform-acuminate, more or less falcate toward the ends of the branches, carinate, rather sharply denticulate toward the apex, sinuate-denticulate in the median and lower portions; costa excurrent into a long, flexuous, denticulate hair-point; upper leaf-cells short, elliptic to isodiametric or rounded-quadrate, rarely more than twice as long as broad, often a little longer on the margins, smooth, in more or less apparent rows; lower cells long and narrow, smooth, the walls thick, pitted, yellowish, the marginal half much longer and narrower; sporophyte unknown.
Type locality: On tree, La Palma, Province of San Jose, Costa Rica, alt. about 1800 m.
{Standley 38011).
Distribution: Costa Rica; Guadeloupe (Duss 695, 1613, distributed as M. vernicosum Schimp.).