226 
Wigglesworth.— Tke young Sporophytes of 
Diagram 4. Showing some of the changes which take place in the vascular arrangement at 
the base of the stem of the young sporophyte of L. complanatum (see Pl. XXII, Fig. 2) above the point 
where the first root comes off. This continues the series of sections shown in Diagram 1. Dichotomy 
is illustrated by the first seven figs. ; the remaining,' Figs. 8-23, show only the stele of the main 
branch, i. e. the right-hand one in Figs. 6 and 7. (PI. XXII, Fig. 15, represents a. stage occurring 
between Diagram, Figs. 9 and 10.) * Shaded parts represent xylem. 
