PERICARPS 



153 



264. Strawberries. The edible part is torus. 



without particular reference to its structure. The botani- 

 cal and horticultural conceptions of a berry are, therefore, 



unlike. In the botanical 

 sense, gooseberries, cur^ 

 rants, grapes, tomatoes, 

 potato - balls and even 

 eggplant fruits (Fig. 261) 

 are berries; strawberries, 

 raspberries, blackberries 

 are not. 



295. A fleshy pericarp 

 containing one relatively 

 large seed or stone is a 

 drupe. Examples are plum (Fig. 262), peach, cherry, 

 apricot, olive. The walls of the pit in the plum, peach, 

 and cherry are formed from the inner coats of the ovary, 

 and the flesh from the outer coats. Drupes are also 

 known as stone fruits. 



296. Fruits which are formed by the subsequent union 

 of separate pistils are aggregate fruits. The carpels in 

 aggregate fruits are usually more or less fleshy. In the 

 raspberry and blackberry flower, the pistils are essentially 

 distinct, but as the pistils ripen they cohere and form 

 one body. Fig. 263. Each of the carpels or 



pistils in the raspberry and blackberry is a 

 little drupe, or drupelet. In the raspberry the 

 entire fruit separates from the torus, leaving 

 the torus on the plant. In the 

 blackberry and dewberry the. fruit 

 adheres to the torus, and the two 

 are removed together when the 

 fruit is picked. 



297. ACCESSORY FRUITS. When 265 - Hipof rose - 



the pericarp and some other part grow together, the fruit 

 is said to be accessory or reinforced (286). An example 



266. Diagram of 

 a pear. The 

 receptacle is 

 a, and the 

 pericarp 6. 



