Evans: TAXILEJEUNEA PTEROGONIA 117 
2. Taxilejeunea jamaicensis sp. nov. 
Pale whitish or yellowish green, growing in loose mats and 
often mixed with other bryophytes; stems mostly 0.15-0.18 mm. 
in diameter, irregularly but often copiously branched, the branches 
obliquely to widely spreading, often copiously branched, the 
branches obliquely to widely spreading, often long and similar to 
the stem but sometimes with smaller leaves even if not sexual: 
leaves, loosely imbricated, the lobe obliquely spreading, plane to 
strongly convex, scarcely falcate, ovate, mostly 0.75-1.2 mm. 
long and 0.5-0.9 mm. wide when well developed, dorsal margin 
arching across the stem and usually distinctly auriculate at the 
base, slightly curved in the outer part, ventral margin slightly 
curved and forming a wide angle with the keel, apex acute or 
apiculate and often tipped with a row of two cells, margin slightly 
and minutely crenulate from projecting cells, sometimes with one 
or two larger and sharper teeth in the vicinity of the apex; lobule 
inflated throughout, ovoid, about 0.15 mm. long and 0.1 mm. wide 
when well developed, keel straight to slightly arched, free margin 
involute to beyond the apex, sinus very short, shallowly lunulate 
(in flattened out lobules), apical tooth an almost straight, slightly 
projecting rounded cell; lobule often imperfectly developed and 
sometimes scarcely evident; cells of lobe about 19 » wide along 
the margin, 36x 27 u in the middle and 38x27, at the base, 
thin-walled but with distinct (and rarely confluent) trigones and 
intermediate thickenings, the latter very rarely more than one in 
each wall, cuticle covered over with exceedingly minute, dot-like 
verruculae: underleaves contiguous to loosely imbricated, convex 
(from below), the lateral margins often involute, orbicular, mostly 
0.6-1 mm. long, bifid one fourth to one third with a narrow, usually 
sharp sinus and broad bluntly pointed or subacute, often contiguous 
or slightly overlapping lobes, distinctly auriculate at the base 
when well developed (but sometimes only cordate or rounded), 
the auricles often contiguous but rarely overlapping, margin as in 
the leaf-lobes: inflorescence autoicous: 2 inflorescence sometimes 
borne on a very short branch but often on a more or less elongated 
branch, innovating on one side (or very rarely on both sides), the 
first innovation often floriferous but rarely immediately so, 
sometimes sterile (and rarely male), the second and one or more 
of the succeeding innovations not infrequently floriferous also; 
bracts slightly spreading, keel rounded, the lobe straight, scarcely 
if at all falcate, ovate to oblong, mostly 0.6-0.9 mm. long and 
0.25-0.4 mm. wide, bluntly pointed to acute, sometimes coarsely 
and irregularly toothed, sometimes merely sinuate, the teeth 
when present usually blunt, rarely more than three or four, lobule 
in some cases distinct even in bracts spread out flat, 0.2-0.25 mm. 
