MORPHOLOGY OF EEPEODUCTIVB ORGANS 109 



In like manner the peduncle may become extra- axillary by 

 contracting adhesions. Thus, in the Lime-tree (fig. 207), the 

 pedimcle adheres to the midrib of the bract, 6, for some distance, 

 and then becomes free ; while in many Solanacese, as in the 



Fig. 208. 



Fig.^207. Peduncle of the Lime-tree (Tilia europxa) attached to the bract, &. 

 Fig. 208. Branch of Woody Nightshade {Solatium Dulcamara), with 

 estra-axillary peduncle, and auriculate leaf. 



Woody Nightshade {fig. 208), the peduncle also becomes extra- 

 axillary by forming adhesions to the stem or branch in various 

 ways. 



We may now proceed to describe the chief forms of in- 

 florescence belonging to the three kinds already mentioned. 



Indefinite or JRacemose Inflorescence. 



This form has been named botryose by Eichler, a term 

 which, however, does not seem preferable to the older name 

 racemose. As we have said, in this variety of floral arrange- 

 ment the main axis is never terminated by a flower, but con- 

 tinues to give off flowers just behind its apex for a considerable 

 time. In most oases the axis is elongated to a greater or less 

 degree, and, as from the mode of development the oldest flowers 

 are farthest from its apex, their order of expansion is acropetal 

 or ascending. In other cases the axis becomes conical, flattened, 

 or even concave at its summit. The growing apex is then at 



