MORPHOLOGY OF THE FEUIT' AND SEED 243 



Examples maybe seen in Colehiciim and Rhododendron. Here 

 each valve corresponds to a carpel, and the valves are said to have 

 their margins turned inwards. In this dehiscence the placentas 

 with the seeds attached are carried away with the valves (fig. 

 514), as in Colchicum. 



B. Locvlicidal Dehiscence. — This term is used when each 

 carpel opens by its dorsal suture, or through the back of the cellsj 

 and the valves separate from the axis, carrying the dissepiments 

 with them {figs. 516 and 517). Here each valve is composed 

 of the united halves of two adjoining carpels, and the valves bear 

 the dissepiments in the middle. Examples may be seen in the 

 Iris {fig. 562) and Hibiscus {fig. 516). 



Fig. 518. 



FiCf. 520. 



V \ 



Fig. Slit 



Fiq. 51H. Diagram of septifragiil combined with septioiilul dehiscence, show- 

 ing the valves breaking away from a central column formed by the union 



of the placentas. Fig. 519. Capsule of CMnda amjuslifolia^ showi]ig 



septifra^al dehiscence. v,i\i>. Valves, a. Axis bearing the dissepiments, 



c c, and seeds, g. Pig. 520. Diagram illustrating septifi'agal combined 



with loculicidal deliisoence. Fig. 621. Capsule of Datura Stramonium, 



showing septifragal dehiscence. 



C. Septiffciga} Dehiscence. — In this form of dehiscence the 

 carpels open by their dorsal or ventral sutures, as in loculicidal 

 or septicidal dehiscence, and at the same time the dissepiments 

 rupture, so that the valves fall away leaving the seeds attached 

 to a central column {figs. 519 and 520). This form of dehiscence 

 may be seen in Datura Stramoni iim {fig. 521) and Cedrcia 



