i9 
Evans —Branching in the Leafy Hepaticae. 
Macoun’s plants, it will be noted that the sharply bilobed leaves are distant 
and tend to be somewhat complicate. The dorsal lobe is almost transversely 
inserted, but the line of attachment of the ventral lobe is distinctly oblique, 
the conditions being much the same as in Pleuroclada albescens. No under- 
leaves are present, each ventral segment bearing instead a single hyaline 
papilla. The incomplete leaf at the base of the branch is undivided and 
acuminate. The first segment of the branch bears a hyaline papilla (not 
visible in the figure) and, in addition, a large leaf-like appendage. Apparently 
there is never coalescence between the appendage and the incomplete leaf, 
although their lines of attachment sometimes approach each other very 
closely. The branches in this plant 
described in Lophozia attenuata . 
Fig. 25. Cephalozia bicuspidata. Ucluclet, 
British Columbia (J. Macoun, No. 1 15). x 40. 
bear a strong resemblance to those 
Fig. 26. Cephalozia curvifolia. Franconia 
Mountains, New Hampshire (A. W. E.), 
x 40. 
In C. curvifolia (sometimes made the type of the distinct genus 
Nowellia ) branching of the Frullania type is not unusual. The leaves in 
this species are attached in much the same way as in C. bicuspidata and 
are characterized by the strongly inflated base of the ventral lobe (Fig. 26). 
The ventral segments produce hyaline papillae, just as in C. bicttspidata. 
The leaf at the base of a branch, lacking the ventral lobe, is reduced to 
a narrow lanceolate lamina with a very short line of attachment. The first 
segment of the branch bears a hyaline papilla, but no leaf-like appendage, 
thus differing markedly from C. bicuspidata and agreeing with such species 
as Lophozia inflata and L. acutiloba. 
Bazzania. — The terminal branching in Bazzania , which conforms closely 
