538 Evans: HEPpPATICAE OF PuERTO RICO 
the margin, 30 4 in the middle and 40x 30 at the base, trigones 
with acute to truncate rays, intermediate thickenings circular: un- 
derleaves imbricated, plane or convex along the lateral margins 
(from below), plane or revolute at the apex, reniform, 1.2 mm. long, 
2 mm. wide, straight to rounded or subcordate at the base and 
sometimes a little decurrent, apex broad, rounded to slightly retuse, 
margin entire or vaguely and irregularly sinuate: inflorescence 
dioicous: ? branch arising from the stem or a leading branch; 
bracts erect-spreading to widely spreading, complicate, sometimes 
with a short and narrow wing along the keel, lobe oblong, 0.85 mm. 
long, 0.35 mm. wide, rounded at the apex, lobule similar to the 
lobe, rounded to apiculate at the apex ; bracteole oblong-obovate, 
0.85 mm. long, 0.4 mm. wide, truncate to slightly bidentate at the 
apex with a lunulate sinus and blunt to apiculate teeth; perianth 
about half-exserted beyond the bracts but almost hidden by the 
foliage leaves, 1.25 mm. long, I mm. wide, truncate to subretuse 
at the apex with a short beak, lateral keels winged to about the 
middle, the wings deeply and irregularly laciniate to within from 
one to three cells of the keel, laciniae long and slender, mostly five 
to ten cells in length and one or two cells wide at the base, surface 
of perianth smooth or nearly so: 3 inflorescence occupying a 
short branch or borne on a longer branch, in the latter case often 
proliferous ; bracts mostly in five to ten pairs, imbricated, sub- 
equally bifid, the lobule obtuse, acute or apiculate, keel narrowly 
alate in the upper part, the wing one cell wide and crenulate ; 
bracteoles at base of spike similar to the underleaves, wanting 
altogether or very rudimentary in the upper part : mature sporo- 
phyte not seen (PLATE 31, FIGURES I-10). 
On trees. Sierra de Naguabo, Sintenis (2). North slope of 
the Luquillo Mountains, Hel/er (784, 1144, 1159, 1161, 4761). 
El Yunque, Evans (25, 67, 126). The species is apparently con- 
fined to the West Indies. In addition to Puerto Rico, it is now 
known from the following islands: Jamaica, the type locality, 
csi os Evans ; Cuba, Underwood & Earle ; St. Kitts, Breutel; 
Dominica, Eggers, Lloyd. The specimens collected by Sintenis, 
which the writer has had the privilege of studying, evidently 
belong to the same species as the other specimens listed above. 
As Stephani states, the Sintenis material agrees closely with 
Swartzian specimens in the Lindenberg herbarium at Vienna, 5° 
that there can be no doubt about the correctness of the deter- 
mination. 
S. transversale is one of the most variable of the Lejeuneae, 4 
