146 _LEJEUNEAE oF THE UNITED STATES AND CANADA 
imbricated underleaves: rhizoids rather abundant: leaves imbri- 
cated, very fragile, distinctly smaller toward the base of the 
branches, the lobe subplane, widely spreading, obliquely ovate, 
0.45 mm. long, 0.3 mm. wide, rounded at the apex, margin entire 
or subrepand, antical margin arching across but scarcely beyond 
axis, rounded at base, postical margin straight or nearly so, form- 
ing an obtuse angle with keel; lobule inflated, ovoid-cylindrical, 
0.11 mm. long, 0.04 mm. wide, slightly constricted near apex, keel 
slightly arched, free margin involute to or beyond apex then trun- 
cate to end of keel, apex tipped with a long, unicellular outwardly 
curved tooth ; cells of lobe with uniformly thickened walls, aver- 
aging 10 in diameter, basal ocelli 40 x 20 رم‎ consisting of two 
to six empty inflated cells: underleaves on ordinary axes contig- 
uous or subremote, on flagelliform branches densely imbricated, 
plane, rotund-suboblate, often subangulate, 0.16 mm. long, 0.19 
mm. wide, scarcely decurrent at the base, bifid almost to the mid- 
dle with acute sinus and acute subconnivent lobes: inflorescence 
dioicous: 9 inflorescence sometimes with a simple innovation; 
bracts unequally bifid, the lobe obliquely ovate, rounded at apex, - 
entire, 0.47 mm. long, 0.42 mm. wide, lobule rhomboid-lingulate, 
apex obtuse or more rarely apiculate, 0.3 mm. long, 0.15 mm. 
wide ; bracteole plane, broadly ovate, 0.42 mm. long, 0.35 mm. | 
wide, slightly connate on one side with bract, shortly emarginate, 
bifid at the apex with rounded divisions and acute sinus, sometimes — 
simply emarginate: perianth unknown: 4 spikes occupying short 
branches or intercalary on leading branches, bracts in few pairs, 
large, subglobose, equally lobed, surface slightly roughened from : 
projecting cells. 1 
Type-locality, Cuba (Wright). 
On trees. Lake Worth, Florida (Underwood). 
Schiffner has described and figured this peculiar little species S0. 
fully and so accurately that the description given above is mostly 
compiled from his. The specimens from Florida agree closely ; 
with those distributed in Hepaticae Cubenses, 
The leafless flagelliform branches with closely imbricated un- 
derleaves are not invariably found in C versifolia and yet they form 
its most striking peculiarity, They resemble in a marked degree | 
the flagelliform branches of Frullania Bolanderi,* a Pacific Coast 
species found in California and northward. - They are much more 
highly specialized than the leafless branches of the related C 
Phyllobola, where the underleaves are no closer than on ordinary ， 
* Evans, Trans. Conn. Acad. I0: pl, 2. f. 4, 1897. 
