Seedling S 'true here of Gymno sperms. I. 
695 
leaves now occupy a position at right angles to the plane of the cotyledons, 
and the metaxylem and phloem of each strand fuse with the adjacent 
corresponding vascular tissues derived from the plumule (Diag. 2, Fig. 3). 
The completion of these rearrangements results in the formation of 
a diarch root, the further changes, at lower levels, merely consisting of 
an increase in the number of protoxylem elements and the constitution of a 
diarch plate (Diag. 2, Fig. 4). 
The main feature of difference between this plant and the other 
4 
Diagram 2. Podocarpus. 
members of Taxaceae, so far as they have been examined, is found in the 
cotyledons, each having two bundles, which together form one pole of 
the diarch root. As will be seen later on, this feature is characteristic of 
certain Gnetales. 
Owing to failure in obtaining material, it is impossible to say whether 
the features described above also obtain in the seedlings of other genera 
of the Podocarpeae. There is, however, a strong indication that such may 
be the casej for Geyler 1 has pointed out that Phyllocladus trichomanoides 
1 Geyler, H. Th. : Einige Bemerkungen uber Phyllocladtis . AbhancL Senckenberg. Naturforsch. 
Gesellsch., xii, 1881. 
