526 



BOTANICAL GAZETTE 



[DECEMBER 



made throughout the uetiole from 



cm 



pinnae 



Figs. 3-10 show the changes undergone in 



Figs. 3-10.— Diagrams illustrating the origin of the vascular strands to the 

 abortive spike, made with the aid of an AbbS camera lucida and reduced one-half in 

 reproduction: distances below abortive spike as follows: fig. 3, 7 . 6 cm.; fig. 4, 5 .3 cm.; 

 fig. 5, 2.1 cm.; fig. 6, 4 mm.; figs. 7 and 8, about 1 mm.; figs. 9 and 10, opposite 

 the abortive spike; adaxial side of petiole placed upward; X15. 



