493 
Anatomy of the Leaf in the Osmundaceae. 
Photos 12 and 13. Todea barbara . Origin of trace to the ninth lowest pinna (sterile) on 
a fertile branch of a leaf. The protoxylem does not divide, but passes off with the branch-trace, 
(x 140.) Slide No. 1996. 
Photo 14. Todea superba. Origin of trace to the pinna of a branch of a leaf; the adaxial 
metaxylem is reduced to a single trachea. ( x 140.) Slide No. 2015. 
Photos 15 and 16. Todea hymenophylloides. Origin of trace to twenty-second main pinna from 
top of a leaf ; some of the soft tissues lining the concavity of the xylem of the main trace accompany 
the protoxylem when preparing to divide. ( x 140 ) Slide No. 2024. 
Photos 17 and 18. Todea superba. Origin of trace to the second smallest top branch of a leaf. 
Similar to Photos 15 and 16, but the bay filled with soft tissues is more marked. (x 67.) Slide 
No. 2012. 
Photo 19. Osmunda bipinnata. Origin of trace to the third undivided pinna at the top of 
a leaf. There is a bay of soft tissues, but the adaxial xylem is reduced to two tracheae, (x 140.) 
Slide No. 1971. 
