66 



STRUCTURAL BOTANY. 



[55, 56. 



with a persistent involucre called a cupule, either soli- 

 tary (Acorn, Hazelnut) or several together (Chestnut). 



156. Drupe, stone-fruit; a 3-coated, 1-celled, inde- 

 hiscent pericarp, as the Cherry and Peach. The outer 

 coat (epidermis) is called the epicarp ; the inner is the 

 nucellus or endocarp, hard and stony ; the intervening 

 pulp or fleshy coat is the sarcocarp (adp^ flesh). These 

 coats are not distinguishable in the ovary. 



157. Tryma, a 2-coated drupe; the epicarp fibro- 

 fleshy (Butternut) or woody (Hickory) ; the nucellus 

 bony, with its cell often deeply 2 -parted (Cocoanut). 



191 



Fruits. 186, Etaerio of Rubus strigosus (Blackberry). 186, Pepo ; section of Cucumber. 187, Berry 

 Grape. 188, Pome ; Cratsegus (Haw). 189, Pyxis* of Jeflersonia. 190, Legume of Pea. 191, Loment of 

 Tesmodium. 192, Silique of Mustard. 193, Silicic of Capsella. 



158. Etcerio, an aggregate fruit consisting of numer- 

 ous little drupes united to each other (Raspberry) or to 

 the fleshy receptacle (Blackberry). 



159. Berry, a succulent, thin-skinned pericarp, hold- 

 ing the seeds loosely imbedded in the pulp (Currant, 

 Grape). 



