PEAR: APPLE 



323 



specialisation of its pollination; many forms absolutely 

 refuse their own pollen, and must have that of other 

 varieties for successful fertilisation. 



Fig. 131. Pear, Pyrus communis. 1, flowering shoot ; 2, vertical section 

 of flower; 3, fruit in section; 4, floral diagram, p. 322 (Wo). 



JJJt Flowers pink and white ; cymes um- 

 bellate; styles united below. Fruit 

 25 30 mm. in diameter, globoid, in- 

 dented at the base. Sepals broad and 

 downy. No thorns. 



Pyrus Mains, L. Apple, Crab. Small tree, with de- 

 pressed fruit. 



Flowers very large, shortly stalked, in corymboid cymes 

 of 5 6. Proterogynous, with half- exposed honey. Petals 



212 



