16 EVANS: HEPATICAE oF PUERTO RICO 
Yellowish-green, apparently becoming pale with age, mixed 
with other hepatics: stems prostrate, 0.15 mm. in diameter, irreg- 
ularly pinnate, branches obliquely to widely spreading, sometimes 
subdivided, often ascending, usually with smaller leaves than the 
stem but scarcely microphyllous: leaves imbricated, the lobe 
widely spreading, slightly falcate, broadly ovate, 0.9 mm. long, 
0.7 mm. wide, plane or somewhat convex, occasionally scarious 
at the apex, attached by a short almost longitudinal line of inser- 
tion and arching across the axis, antical margin nearly straight 
near the base, then strongly outwardly curved to the broad and 
underleaves of stem distant, plane, orbicular, 0.35 mm. long, 
cuneate toward the base and attached by a short and almost 
straight line, retuse at the apex with broad and rounded lobes, 
margin as in the leaves; underleaves of the ascending branches 
contiguous to subimbricated, more or less reflexed at the broad 
ng, 0.5 mm. wide, 
rounded at the apex, margin as in the leaves, keel sharp, some- 
times with a narrow and entire wing in the upper part, lobule ovate 
to obovate, 0.4 mm. long, 0.2 mm. wide, rounded to very obtuse 
at the apex ; bracteole free or very slightly connate on one side, 
orbicular, 0.4 mm, long, cuneate toward the base, broad and 
