Vascular System of P ter is. 5 
assigned. In the specimen of which we have spirit-material, two 
nodes were preserved, and at each of these the stem dichotomised, 
the stout petiole coming off between the two branches and forming 
a direct continuation of the part of the stem behind the fork. 
Fig. 1. Hypolepis tenuifolia. Diagram of vascular system of node seen from 
dorsal side. L. T., leaf-trace, l.sh., stele of lateral shoot. Fig. 2. Ditto 
of Hypolepis repens, a, b, c, dd, see text. (From Gwynlie-Vaughan, l.c.) 
In one case a shoot-bud also arose from one side of the petiole near 
its base, while in the other two such buds arose. Figs. 5-12 
represent selected sections from a series through one of the two 
nodes (which were exactly alike), while Fig. 3 is a reconstruction 
of the stem-steles and the petiolar strand. From these it will be 
seen that while the stele of the internode is a solenostele, rather 
flattened in the horizontal plane, and wavy on the ventral side, from 
which roots are given off (Fig. 5), complications arise as the node is 
Fig. 3 . 
Fig. 3 Pteris incisa var. integrifolia. Diagram of vascular sj'stem of node 
seen from dorsal side. A, B, the two lateral folds of the stele. A 1 , B 1 , 
ditto of leaf-trace. St. Br. t , St. Br. 2 , steles of branches of dichotomy. 
5—12, plaues of section of figures 5—12. a, e, see text. 
