DIV. I 



MORPHOLOGY 



129 



especially when, as is frequently the case, the sympodium stands vertically and 

 the arrested ends of the branches appear as if home laterally upon it. They 

 are distinguishable from truly lateral 

 branches, however, by the regular absence 

 of a subtending leaf, while a leaf which 

 stands opposite to each apparent branch s /* 



is really the subtending leaf of the 

 daughter shoot that continued the sym- \ 



podium (cf. Fig. 152). The further V J[ 



branching may also be sympodial. The 

 branching of many trees, such as the Lime 

 and Beech, is of this nature, but the 



Fin. lol. Diagram of the sympodial construction is not recognisable 

 Dichasium. H, Axis of j n the stems and branches. It remains 

 the seedling ; l, S, 3, * evident however, in many subterranean Fl - ^.-Diagram 

 daughter axes of the cor- At- ^ -^ , ,,-.-, 



responding first, second,. shoots such as the rhizome of Polygo- 

 and third orders. natum multiflorum (Fig. 138). The 



terminal bud of each year's growth be- 

 comes the aerial shoot, while an axillary bud continues the growth of the rhizome 

 in the soil. 



According to the relation of the lateral shoots of different orders to each other 



of the Monocha- 

 slum. Cf. Fig. 

 151. 



FIG 153. Cymose inflorescence (dichasinm) of Cerasti u m 

 collinum. t-t"", Successive axes. (After DUCHARTRE.) 



FIG. Ib4.Heliotropium Curassavicum, 

 Cincinnus. (After EXGLER-PRANTL.) 



there arise monochasial branch- systems of diverse and very characteristic construc- 

 tion. The branching frequently proceeds from the axil of a bracteole. 



