SEXUAL REPRl >/' < 'CTK >JV 



305 



pericarp | fig. 354). In the blackberry the receptacle be- 

 comes fleshy, and each pistil forms a minute fruit like a 



Fig. 354. — Fruit of the apple. A, halved longitudinally; 

 pericarp, enclosing seeds ; g, vascular bundles of the tit 

 calyx leaves. One hall natural size.— After Focke. 



alved transversely. /, 

 torus entering k, the 



cherry, adherent to its neighbors and to the pulpy torus. The 

 raspberry is like it, except that the adherent mass of fruits 

 separates as a cap from a firm torus (fig. 355). 



413. Multiple fruits. — If the flowers form a crowded in- 

 florescence, either dry or fleshy fruits may be closely crowded 

 at maturity. Under these conditions fleshy fruits frequently 

 become adherent, and may thus constitute a multiple fruit 

 quite similar in form to the fruit formed by the aggregated 



Fig. 355 



Fig. 356. 



Fir.. 3H5. — Vertical section of a flower of raspberry (Rubus idtrus), showing numerous 

 pistils which form the caplike fruit over the enlarged torus; olla, and 



calvx all united .it base. Magnified about 2 <li. 

 Fig. 156.— A, pistillate flower cluster ol white 1 



Natural si/e Alt. i P.aillon. 



Alter kerne 

 ilberry; B, multiple fruit from same 



