604 Evans: New WEst INDIAN LEJEUNEAE 
the inner surface of the lobule, hyaline papilla usually distal: cells 
of lobe averaging about 18u at the margin and 30 X 25y in the 
median and basal portions, walls more or less thickened, with 
small but distinct triangular trigones and occasional intermediate 
thickenings: underleaves contiguous or subimbricated, broadly 
cuneate, about 0.3 mm. long (0.15 mm. to the bottom of the sinus) 
and 0.45 mm. wide, bifid about one half with broad and rounded 
obliquely spreading divisions and an acute sinus: inflorescence 
autoicous: 9 inflorescence borne on a leading branch or on a 
more or less abbreviated branch, the innovation usually simple 
and sterile but sometimes bearing a second female flower; bracts 
obliquely spreading, sharply complicate, the keel with a very 
narrow wing, bifid about one fourth, the lobe narrowly oblong- 
obovate, 0.75 X 0.18 mm., rounded at the apex, lobule a little 
shorter and narrower, 0.68 X 0.15 mm., rounded at the apex; 
bracteole ovate, 0.68 mm. long, 0.3 mm. wide, bifid about one 
eighth with erect rounded to obtuse divisions and a broad obtuse 
sinus; perianth oblong-obovate, 1.1 mm. long, 0.6 mm. wide, trun- 
cate at the apex and with a very short beak, more or less compressed 
and sharply five-keeled: ¢ inflorescence occupying a short branch, 
not proliferating; bracts mostly in from four to six pairs, im- 
bricated, inflated, subequally bifid with a strongly arched keel and 
rounded divisions: bracteoles oblong-quadrate, bifid about one 
third with rounded divisions: mature sporophyte not seen. 
(PLATE 45, FIGURES 1-6.) 
On bark of trees. Jamaica: Cinchona, D. S. Johnson (14), 
April 1903; Evans (250 in part), July 1903. No. 14 may be 
designated the type. 
It can not be stated with certainty whether D. Johnsonti is 
gemmiparous or not. A few young gemmae were observed on the 
lower surface of a single lobe, but they may not have devel- 
oped in this situation. The species is characterized by the strongly 
convex lobes with the apical and postical margins tending to be 
revolute, by the peculiar teeth of the lobules, by the broad and 
rounded divisions of the underleaves, by the autoicous inflores- 
cence, and by the rounded divisions of the perichaetial bracts 
and bracteoles. The revolute portion of the lobe usually involves 
the junction of the lobe with the lobule, one effect being that the 
end of the sinus is displaced to the lower surface of the lobe. The 
apical tooth of the lobule is in the form of a triangle about as 
broad as high, and the apex is sometimes slightly curved to one 
side. The proximal tooth looks at first as if jt were composed of a 
