144 _LEJEUNEAE OF THE UNITED STATES AND CANADA 
on a short branch, rarely on a leading branch, innovating on one 
side, the short innovation sometimes sterile, sometimes bearing 
another 9 or a 8 inflorescence, rarely absent; bracts unequally 
bifid, complicate, the lobe widely spreading, 0.45 mm. long, 0.35 
mm. wide, ovate to orbicular, more or less falcate, rounded at 
apex, margin as in leaves, postical margin strongly curved, lobule 
ovate to lanceolate, rounded to acuminate at the apex, 0.3 mm. 
long, 0.1 mm. wide; bracteole free, ovate, 0.35 mm. long, 
0.25 mm. wide, bifid about one third with erect, acute di- 
visions and acute sinus, margins indistinctly angular-crenulate ; 
perianth about half exserted, obovoid but distinctly cuneate toward 
base with almost straight sides, 0.6 mm. long, 0.4 mm. wide, 
truncate or slightly retuse at the broad apex and with a short 
Type-locality, Cuba (Herb. Montagne), 
On trees. Florida (Underwood). The species is now known 
from several of the West Indian Islands, from Mexico and from 
Costa Rica. It has also lately been reported from China. 
The determination of the present species is based on the speci- — 
mens in Wright's Hepaticae Cubenses. These were named by ~ 
Gottsche, and the determination was afterwards confirmed by Schiff > 
ner. The type specimens have not been consulted by the writer. 
C. phyllobola is remarkable for the insecure way in which its 
side-leaves are attached to their axes, the slightest force being 
sometimes sufficient to break them away. As a result leafless 
branches are frequent, although these are much less characteristic 
than in C. versifolia. In its leaf-cells the species exhibits consid- 
erable variation, the trigones being sometimes conspicuous and 
sometimes difficult to demonstrate, while the intermediate thicken- _ 
Ings are sometimes large and abundant, sometimes smaller and E 
more scattered and sometimes wholly absent. In all the various — 
forms the cell-measurements remain fairly constant. à 
C. phyllobola has been confused with Lejeunea cavifolia, with 
Microlejeunea lucens and even with Zuosmolejeunea duriuscula. 
