LEJEUNEA PATENS 149 
According to Spruce C. pililoba should also be placed in his sub- 
genus Zulejeunea, but it seems best to transfer it to Chetlolejeunea on 
account of its compressed perianth with obsolete antical keel. 
According to the original description, the type-specimens of C. 
۱/0004 were entirely sterile, and yet on this negative evidence 
the species was said to be dioicous. The specimens in the British 
Museum, from which the published figures were drawn, show, how- 
ever, flowers of both sexes on the same stem. None of the arche- 
gonia are fertilized, and the plants look as if they had grown in an 
unfavorable locality, where they were unable to develop normally. 
The specimens are not quite so large as those described by Spruce, 
and the filiform lobule is usually less than twelve cells long, al- 
though this length is given as one of the specific characters. The 
specimens from Florida and also those from Cuba (Matanzas, 
mixed with Hep. Amer. 145) agree closely with the British Mu- 
seum specimens. Both are distinctly autoicous and the Cuban 
plants show well-developed perianths. 
13. LEJEUNEA PATENS Lindb. 
Jungermannia serpyllifolia Dicks. Fasc. Pl. Crypt. Brit. 4: 19. 
1801. : 
Pandulphinius serpyllifolius S. F. Gray, Nat. Arr. Brit. Plants, 
1: 089. 1821. : 
Lejeunea patens Lindb. Acta Soc. Sci. Fenn. 10: 482. 1875. 
Pale or sometimes darker green, slightly glossy when dry, 
caespitose : stems prostrate or slightly ascending, 0.08 mm. in 
diameter, copiously and irregularly branched: rhizoids few: 
leaves imbricated, the lobe ovate, widely spreading, falcate, 
strongly convex, 0.5 mm. long, 0.35 mm. wide, rounded and 
decurved at apex, margin distinctly crenulate from projecting cells, 
antical margin rounded or sometimes contracted at base, arching 
across or a little beyond axis, postical margin forming an angle oı 
90” or less with keel, angle in poorly developed leaves often 
obtuse ; lobule strongly inflated, ovate, 0.17 mm. long, 0.1 mm. 
wide, keel arched, mostly crenulate, free margin curved and invo- 
lute to beyond apex, then lunately truncate to end of keel, apex 
tipped with a single blunt, projecting cell; cells of lobe convex, 
thin-walled, but usually with conspicuous trigones and intermediate 
thickenings, walls sometimes thin throughout, cells averaging at 
edge of lobe 14 y in diameter, in the middle 19 y, at the base 
