20 



PART I. MORPHOLOGY. 



more lateral axes are developed in different directions and grow 

 with nearly equal vigour (Fig. 10) and more vigorously than the 



primary axis, 



ir* which soon 



ceases to 

 grow ; such 

 a system has 

 a certain re- 

 semblance to 

 a dichotomy 

 or polytomy, 

 and is called 

 a false di- 

 chotomy (Di- 

 chasium) or 

 a false poly- 

 tomy (Poly- 

 chasium) : or 

 (/3) a pseud- 

 axis is formed / this takes place when only one lateral axis de- 

 velopes vigorously in each case, as in Fig. 11 A where the lateral 

 axis 2 has grown more vigorously than the mother-axis 1, and so 

 on. (In the diagram the dark lines indicate the more vigorous 



FJG. 10. Diagram of a False Dichotomy or Dichasium ; the Boman 

 numerals indicate the order of development of the shoots of the 

 *.\ wieni. (From Sachs.) 



In- ll.-Cyraose branchings represented diagrammatically. A B Scorpioid (cincinnal) 

 cyme. C Dichaeial cyme. D Helicoid (bostrychoid) cyme. The numerals indicate the 

 order of succession of the lateral shoots which spring from en.ch other. (Figs A B and D 

 are ground-plans ; Fig. C is a projection hit > the plane of the paper.) 



