XIX] 



ANATOMY 



65 



Fig. 360 B. Diagrams illustrating the origin of the strands which supply the fertile spike in 

 Botrychium virginicmum. Fig. i is from the lowest section : xylem is shaded, phloem left 

 clear. Compare Figs. 359, 360 A. The adaxial side of the petiole is placed upward. 

 (After Chrysler.) 



Fig- 361. Transverse section of leaf of 

 Hehninthostachys, showing the relation 

 of the vascular supply of the spike [sp) 

 to that of the three pinnae. (From slide 

 578, Gwynne-Vaughan Coll.) (x 10.) 



Fig. 362. Ophioglossitm palmatutii. Successive 

 transverse sections of the fertile leaf: 14-16 

 show the origin of the vascular supply to the 

 lowest of its spikes ; 17, transverse section of 

 the stalk of that spike; 18-23, successively 

 higher sections showing the origin of the 

 supply to the second and third spikes. ( x 4.) 



