128 



BOTANY 



I'ART I 



plane as in the diagram but stand at right angles to one another so that they 

 diverge on all sides. Only a ground plan (Fig. 155 E] can therefore represent 

 the true arrangement of the members of the branch- system. 



III. When the branching is continued by a single lateral branch the term 



FIG. 150. Diagrams of racemose inflorescences. A, Raceme. L, Spike. C, Umbel. 

 D, Capitulum. E, Panicle. F, Compound umbel. (After KARSTEN.) 



MONOCHASIUM is used. Frequently this branch continues the direction of the 

 parent shoot, the tip of which is displaced to one side (Fig. 152). In this way 

 a branch-system with a sympodial axis composed of lateral members of successive 

 orders is formed, as was seen to be the case sometimes in dichotomous branching 

 (p. 119 ff.). Such a branch-system may closely resemble monopodial branching, 



