West. — A Contribution to the Study of the Marattiaceae , 399 
Text-fig 28. Danaea nodosa , Sm. Transverse section of the apex of a large root showing 
four equivalent initial cells, x 240. 
TeXT*fig. 29. Danaea alata, Sm. Longitudinal section of the apex of a large root showing 
meristematic region, x 220. 
not necessarily upon the age of the roots in question ; the stronger and more 
robust the root, the larger the number of equivalent initials which constitute 
the apical meristem. 
The adventitious roots of Danaea and of Kaulfussia originate from the 
undifferentiated stelar tissues in the very young region of the stem (also cf. 
