Fissidens hallii

Fissidens hallii Aust. Bot. Gaz. 2: 97. 1877
Fissidens Austini Barnes, Bot. Gaz. 12: 32. 1887.
Plants small, 2-4 mm. high; leaves 4-8 pairs, narrowly oblong, acute, the upper and perichaetial largest, reaching 1.5 mm. in length, finely and regularly crenulate on the upper margin, smooth, the costa pale, subpercurrent ; vaginant laminae serrulate, half the length of the leaf, with narrower elongated cells at base; dorsal lamina tapering to leaf -base; upper median leaf-cells not incrassate, rounded-hexagonal to subquadrate, 7-10 m in diameter; dioicous; sporophyte terminal; seta 2-3 mm. long; capsule obovoid, erect and symmetric, the urn 0.50.75 mm. long, the exothedal cells not incrassate, oblong-rectangidar, with largest dimension longitudinal at base, transverse in the middle, several rows of smaller hexagonal cells below the mouth; operculum long-rostrate, a little shorter than the urn; divisions of the peristometeeth papillose and spirally thickened; spores in spring.
Type IvOCality : Texas {Hall) .
Distribution: On bark of trees and logs in damp places; Florida {Rapp, Grout); Texas,