348 



BOTANICAL GAZETTE 



| MAY 



two subsections: Ternata, of eight species; and Cicutaria, of 

 three species. The material investigated consists of rhizomes of 

 B. ramosum and B. lanceolatum var. angustisegmentum, of the sec- 

 tion Eubotrychium, to which B. Lunaria also belongs; of B. 

 obliquum and B. tematum var. intermedium, of the subsection 

 Ternata; and of B. virginianum, of the subsection Cicutaria. 



Rhizomes of these five species were examined in serial sections 

 for the presence of such axillary buds as have been described by 



Fig. 2. — Transverse sections of a branching rhizome of Bolryckium lanceolatum 

 var. angustisegmentum: x, original xylem of the stem and leaf trace; nx, xylem formed 

 after the injury; ph, phloem; X12. 



Lang. In all these species, such buds are uniformly present in 

 rhizomes of all ages, and it may be assumed that they are of con- 

 stant occurrence in all species of the genus. Their origin and 

 development will be considered later. 



VASCULAR CONNECTION'S OF THE BRANCHES 



Roeper's (13) figures represent rhizomes of B. Lunaria with 

 2-7 lateral branches. Holle (6) figured a single branching speci- 

 men of the same species in longitudinal section, and pointed out 

 that in this case the branch stele connects with the trace of the leaf 



