FORMS OF THE PERICARP. 



55 



153. Caryopsis, the grain or fruit of the Grasses, is a thin, dry, 

 1-seeded pericarp, inseparable from the seed. 



154. Samara; dry, 1-seeded, indehiscent, furnished with a 

 membranous wing or wings (Ash, Elm, Maple). 



ISO 



ITfi 



155. Glans, or nut; hard, dry, indehiscent, commonly 1-seeded 

 by suppression ( 145), and invested with a persistent involucre 

 called a cupule, either solitary (Acorn, Hazelnut) or several 

 together (Chestnut, Beechnut). 



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

 carp, exemplified in the Cherry and Peach. The outer coat 

 (epidermis) is called the epicarp; the inner is the nucleus or 

 endocarp, hard and stony ; the intervening pulp or fleshy coat 

 is the sarcocarp (rfap, flesh). These coats are not distinguish- 

 able in the ovary. 



157. Tryma, a kind of dryish drupe, 2-coated; the epicarp 

 fibro-fleshy (Butternut) or woody (Hickory) ; the nucleus bony, 

 with its cell often deeply 2-partcd (Cocoanut). 



158. Etoerio, an aggregate fruit consisting of numerous little 

 drupes united to each other (Raspberry) or to the fleshy recep- 

 tacle (Blackberry). 



159. Berry, a succulent, thin-skinned pericarp, holding the 

 seeds loosely imbedded in the pulp (Currant, Grape). 



1GO. Hcsperidium, a succulent, many-carpclled fruit; the rind 



