Evans: HEPATICAE OF PUERTO Rico 213 
DIPLASIOLEJEUNEA PELLUCIDA (Meissn.) Schiffn. 
Jungermannia pellucida Meissn.: Sprengel in Linnaeus, Syst. Veg. 
ed. 16. 4?: 325. 1827. 
Lejeunea ocellulata Mont. & Nees, Ann. Sci. Nat. Bot. II. 19: 264. 
1843. 
Lejeunea pellucida Meissn. in G. L. & N. Syn. Hep. 393. 1845. 
Lejeunea albifolia Tayl. Lond. Jour. Bot. 5: 399. 1846. 
Lejeunea (Diplasio-Lejeunea) pellucida Spruce, Hep. Amaz. et And. 
302. 1884. | 
Diplasiolejeunea pellucida Schiffn. in Engler & Prantl, Nat. 
Pflanzenfam. 13: yar, 1895. 
Pale green or whitish, growing scattered or in depressed mats: 
m. in diameter, sparingly and irregularly pinnate, 
the branches (except the subfloral innovations) widely spreading, 
pressed to the substratum, broadly ovate, 0.85-1 mm. long, 0.7- 
0.85 mm. wide, antical margin rounded at the base and extending 
eae wide, abruptly broadening from a narrow base, inflated 
‘roughout, keel arched, free margin more or less involute, often 
nvolving the proximal tooth, apical tooth obliquely spreading, 
acute, mostly three to five cells long and three or four cells wide 
at the base 
terminal] ce 
a papilla mostly on the distal side of the apical tooth, 
Margin eran cells long; cells of lobe averaging about 12y at the 
walla re 7g ag in the middle, and 35 X 20u at the base, the 
interm ae sal less thickened but with vague trigones and occasional 
thin-walled, thickenings, hyaline marginal cells (when present) 
broad] ed: underleaves distant, rounded to cordate at the base, 
bifid td "carey about 0.085 mm. long and 0.4 mm. wide, deeply : 
fae nt Widely spreading acuminate divisions, the apical sinus 
from Baie shallow or even obsolete, margin entire or subcrenulate 
tae Y continuing the floral axis and often bearing another 
nee; bracts obliquely spreading, sharply complicate but 
