218 Evans: HEpATICAE OF PUERTO RICO 
distant, orbicular, 0.15 mm. long, bifid about two thirds with erect 
triangular and acute lobes separated by a narrow sinus, margin 
entire or repand, rarely indistinctly crenulate from projecting cells: 
inflorescence autoicous: 2 inflorescence borne on a very short 
branch without innovation; bracts widely spreading, the lobe 
ovate, 0.7 mm. long, 0.45 mm. wide, apex broad but usually 
apiculate, margin as in the leaves, lobule oblong to lanceolate, 
0.35 mm. long, 0.12 mm. wide, rounded to acute at the apex, 
margin entire; bracteole free, ovate-orbicular, 0.5 mm. long, 0.4 
mm. wide, bifid about one third with erect, acute or obtuse, tri- 
angular lobes and narrow sinus, margin slightly and irregularly 
denticulate from projecting cells ; perianth triangular in outline 
with nearly straight sides, 0.85 mm. long, 0.7 mm. wide in broadest 
part, postical keel broad and rounded, apex obcordate with a short 
but distinct beak, lateral keels extended upward as rounded auricles 
and bearing above the middle two narrow and interrupted, denticu- 
late or shortly spinulose wings, surface of perianth slightly rough- 
ened from projecting cells: ¢! inflorescence usually occupying a 
short branch but sometimes terminal on a longer branch ; bracts 
in two to four pairs: mature sporophyte not seen (PLATE II, FIG- 
URES I-17). 
On shaded rocks. El Yunque, Evans (129, 169). No. 169 
may be designated as the type. 
The species described above agrees in many respects with 
Spruce’s Leyeunea denticulata, as represented by the specimens dis- 
tributed in the Hepaticae Spruceanae. It differs very considerably, 
therefore, from the Lejeunea denticulata of Stephani and Gottsche. 
Stephani (zz “tz.) refers P. aeguitexta with some question to 4 
manuscript species of Gottsche and calls attention to the slight 
variation in the size of the leaf-cells. As however this determina- 
tion is not altogether certain, and as Gottsche’s species has nevet 
been published even as a xomen nudum, it seems advisable to give 
the Puerto Rico plant a different name. 
Spruce compared his Lejeunea denticulata with L. decora 
Tayl.,* originally collected on the island of Dominica, but threw 
doubt on the validity of the latter species. Later, however, he 
referred to it provisionally a plant collected by Elliott on St. Vin- 
cent.t According to Bescherelle the species has also been found 
on Guadeloupe by L’Herminier.t The type-specimen of L. decor 
4% Lond. Jour. Bot. 5: 393. 1846. 
+ Jour. Linn. Soc. Bot. 30: 338. 18094. 
t Jour. de Bot. c 897. 880s. 
