W. Stiles. 
2 16 
vertical direction through the cortex of the axis, but soon bends 
outwards into the scale. Shortly after entering the tissues of the 
latter, two small strands are given off from the middle of the bundle 
on its upper side. The lower bundle supplies the scale, the upper 
bundles, which have their xylem and phloem with reversed orientation, 
supply the sporangium. The resin-canal does not divide, but remains 
Fig. 33. Longitudinal section of the same, x 500. 
on the lower side of the larger bundle; the smaller bundles have no 
resin-canal. After this first bifurcation the lower bundle splits 
more or less into a row of smaller bundles, those at the end of the 
row on either side bending round so as to lie in, and form part of, 
the upper row. .The remaining bundles of the lower row now join 
up'into a single bundle with several short tracheids scattered in the 
