Campylopus saxatilis

Campylopus saxatilis R. S. Williams, sp. nov
Plants in rather pale-green tufts, tomentose within, about 3 cm. high: leaves mostly uniformly placed along the stems, erect-spreading, flexuous, about 5 mm. long, from an ovate or lanceolate base gradually narrowed to a long, slender, serrulate apex, the narrow leaf-blade ■extending far above the middle; costa about 250 y wide below and one half the width of the
leaf -base, in cross-section showing large cells on the ventral side Extending one third through and a median row of much smaller cells with a stereid-band below ; alar cells red to hyaline, the •cells at the margin just above hyaline, narrowly rectangular, those within broader, mostly «hort-oblong with thickened walls slightly pitted, those farther up all shorter, more or less obliquely oblong to rhomboidal with rather uniformly thickened walls; inner perichaetial leaves about 7 mm. long, with a convolute base extending one half up and gradually narrowed to a serrulate subula: seta flexuous, smooth, 10 mm. long: capsule without lid 1.25 mm. long, -curved-ovate, nearly smooth at the base, furrowed when dry, distinctly strumose, with an obliquely rostrate lid 1 mm. long; peristome-teeth about 55 y wide at the base; annulus large: •calyptra not ciliate: spores rough, up to 16 y in diameter.
Type collected at Cinchona, Jamaica, on rock at about 1500 meters, March, 1907, Harris 11143
{herb. N. Y. Bot. Gard.).
Distribution: Known only from the type locality.