392 Boodle . — Anatomy of the Schizaeaceae . 
a nearly orbicular, or ovate cordate lamina. The next leaf is 
tripartite. 
Mohria, habit. 
The stem of Mohria caffrorum , Desv., is an ascending or 
nearly horizontal rhizome, and bears polystichous leaves 
which appear to have a 2/5 phyllotaxy, as in Anemia Phyllitidis. 
The leaves are bipinnate, that is, in the lower region of the 
pinnae. The genus includes about three species. Christ 
(’ 97 , p. 352) describes it as ‘ vielleicht der auffallendste aller 
Fame, indem er die Fructification einer so weit entlegenen 
Gruppe mit der Organisation einer Pteridee vereinigt.’ In 
anatomy, however, Mohria shows close relation to the type 
of structure of species of Anemia. 
Mohria, stem. 
Prantl (’ 81 , p. 26) states that Mohria agrees completely in 
the structure of its strands with the majority of Anemias , 
only the fibres are absent. This is the case, as the points 
of structural differences between it and the dialystelic Anemias 
lie chiefly in unimportant details such as the distribution 
of sclerenchyma in the stem and petiole, and the outline of 
the bundles. 
In the mature stem of Mohria caffrorum the epidermis 
is thin-walled and contains mucilage. The outer cortex or 
ground-tissue is fairly thin- walled, and is followed by a zone of 
brown sclerotic tissue which surrounds the vascular cylinder, 
but has an irregular form, as it curves outside the incoming 
leaf-traces. The central tissue within the vascular cylinder 
also consists of brown sclerotic elements. Fig. 35 shows the 
arrangement of the vascular tissue in a transverse section. 
This is drawn from a young stem in which the tissues were 
not mature, so the sclerotic ground tissue is not yet differ- 
entiated. In this figure, sc. is a group of sclerotic tissue 
filling the concavity of a leaf-trace. In the mature stem one 
such group, which is continuous with a similar one in the 
petiole, accompanies each leaf-trace through the cortex, and 
