144 DICOTYLEDONS 



(drupe) (fig. 128). Thus the fruit is simple, and consists 

 of one drupe. The stipules of Prunus are not persistent, but 

 drop oiif. 



Table showing some Distinctions between different 

 Species of Prunus. 



I. Leaves rolled [('') ^™bioT"*' ^''''°''\^^^-^^ ^Pr^^ius domestica). 

 (convolute) \ ' ^ 



in the bud. 



\{b) Fruit velvety, yellow. — K'^noaV^Prunus armeniaca). 



II. Leaves folded 

 (conduplicate) - 

 in the bud. 



\a) Fruit black, red, or"j 



yellow, smooth, VCherry (Prunus cerasus). 

 without "bloom." J 



(b) Fruit inore or less-j pe^ch (Prumts fersica). 

 greenish, usually L^ ^^^^^ ^^j^^y „f ^^e Peach is 

 velvety. j known as the Nectarine.) 



Types V.: APPLE and PEAR {Pyrus): 

 VI. : HAWTHORN (Cratrngus). 



The genus Pyrus includes both Apples and Pears. The flower 

 (fig. 178) of Pyrus possesses five sepals (ex), five petals (cor\ 

 numerous stamens (a), and usually five carpels (fig. 179 cp). 

 Not only is the receptacle {re) hollowed to form a cup '(as in 

 the Rose), but the outer faces of the carpels are fused with the 

 lining of the receptacle;J;ttbe. Thus the flower is markedly 

 epigynous. The five carpels are also united to one another 

 by their sides, and, at the most, are only free from each 

 other along their ventral sutures and styles; consequently, a 

 five-chambered inferior ovary is produced. In the flower of 

 the Pear the five styles are separate but in the Apple the styles 

 are united at their bases. Each of the five ovary-chambers 

 contains not more than two ovules. As the frtdt (figs. 180, 

 181, 182) ripens, the lining of each chamber of the ovary 

 becomes a parchment-like endocarp {cp). The portion (re) 

 lying outside this core of five endocarps enlarges greatly, and 

 is responsible for the production of the large, fleshy part of 

 the Apple or Pear fruit. The fruit is a peculiar inferior fruit 

 known as a pome. Dissemination. — ^The fruits are adapted 



