220 Wigglesworth . — The young Sporophytes of 
Diagram i, Figs. 1-12. Showing changes in the vascular arrangement in the foot region and 
base of the stem of L. complan&tum (see PI. XXII, Fig. 2) up to just above the point where the first 
root is given off, proceeding from below upwards. (PI. XXII, Fig, 1 2 shows the first appearance 
of xylem in the foot.) 1, 2, and 3 in Figs. 9, 10, 11, 12 indicate the xylem strands which belong to 
the first root ; iii Fig. 12 two of these have united. Shaded parts represent xylem. 
