PLANT ORGANS AND ORGANISMS 
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Drupaceous fruits are those in which the endocarp is always 
fibrous or stony in consistence, while the mesocarp is more or less 
succulent. The endocarp may become cuticularized as in the 
Apples. The mesocarp may form stone cells lying in the midst of 
Fig. 99.—Types of capsular fruits. 1, Pod of Aconite; 2, Capsule of Colchi- 
cum showing septicidal dehiscence; 3, capsule of poppy, having porous dehis¬ 
cence; 4, pyxis of Henbane55, dehiscing regma of Geranium; 6, siliqua of Celan¬ 
dine showing valves opening from below upward; 7, silicule of Cochlearia; 8, 
egume of Pea. 
soft parenchyma cells as in Pears; it may become hardened and 
thickened by lignin deposits to form fibers as in the Cocoanut, or 
it may become swollen and soft-succulent as in Peaches, Cherries, etc. 
I. Capsular Fruits. —These may be simple, when composed of one 
carpel as the follicle and legume, or compound, when composed of 
two or more carpels as the capsule, pyxis, regma, siliqua or silicule 
