BOTANICAL SUBJECTS. 



69 



Fig. 3 shows two heads (which are themselves originally the 

 result of fusion), fusing into a more elongated head, so as to 

 resemble the crest of a cockscomb amaranth. The line of junction 

 of the two disks is traceable in this case. 



Fig. 3. Fusion of t^vo already fused capitula = four heads. 



Then Fig. 4 shows a still more elongated head, the fusion of 

 two, which may have been already fused many times over. Both 

 the peduncle and the disk show the line of junction. 



Fig. 4. A fufci^n of fused heads, i reducing a very elongated disk. 



