Holomitrium wrightii

Holomitrium wrightii Sull. Proc. Am. Acad. 5 : 279. 1861
Pseudautoicous: male plants minute, in clusters on tomentum of the older perichaetial buds, the stems about 1 mm. high, bearing 2 or 3 flowers, the inner antheridial leaves broadly ovate, short, acute, the outer leaves much longer, broadly lanceolate above, with often distant, spreading teeth on the margin and the costa faint; antheridia 5 or 6, about 0.25 mm. long, with paraphyses: fertile plants in rather dark-green tufts, with branching stems up to 6 cm. long: stem-leaves nearly linear, 3.5-4.5 mm. long and 0.4 mm. wide, more or less twisted and subtubulose above, never crispate when dry, about four fifths up the leaf narrowed to an acute point, the not thickened margins with irregular, spreading teeth extending downward one third to one half way to the base; costa shortly excurrent, 50-60 m wide in the lower part of the leaf, smooth on the back, in cross-section showing about 4 large cells on the upper side, about the same number of similar cells on the under side with 5 or 6 much smaller cells enclosed within, all with rather thin walls; alar cells distinct, pale-yellowish to hyaline, extending about half way to the costa; cells of the blade rectangular from the base about three fourths of the way up the leaf, with somewhat thickened, pitted walls, the median ones about 10 /x wide by 30-40 it long, the remaining cells in the upper part of the leaf becoming more or less obliquely elongate-hexagonal; perichaetial leaves convolute about one third up the seta, the inner gradually narrowed to a slender point usually shorter than the basal part and slightly serrulate at the apex: seta yellowish, about 1.5 cm. long: capsule oblong-cylindric, 3 mm. long, smooth, with 2 rows of stomata near the base; peristome-teeth densely papillose, reddish-brown below, pale above, attached well below the rim and projecting above it about 150 ju, irregularly divided, more or less perforate below, the apex often blunt; lid with a subulate beak about one half as long as the capsule: spores not quite smooth, 12-14 y in diameter.
Type locality: Cuba.
Distribution: Known only from the type locality.