322 HAWTHORN : PEAR 



Inflorescence a complex corymboid cyme; pedicels 

 glabrous. Calyx-tube urceolate, enclosing the carpels 

 and the greater length of the styles. Calyx-teeth short, 

 lanceolate, reflexed. Petals broad-obovate or sub-rotund, 

 spreading, white or dashed with pink. Stamens 20, or 

 more ; anthers purple. Pollen lemon-yellow, ellipsoid, 

 large, 54 /a long, with 3 longitudinal striate folds. Carpels 

 1 3, each with a long style, not fused on the internal 

 faces but closely invested by the calyx-tube. Fruit the 

 " haw " ; a false, berry-like structure composed of the red 

 fleshy calyx-tube investing 1 3 achenes. 



OO Carpellary walls -papery, cartilaginous, 



or parchment-like. Fruit a pome, 2 5- 



celled. Flowers showy. 



^ Leaves involute. Flowers large, 30 50 



mm. in diameter and more, in simple 



cymose tufts. Fruits over 20 25 mm. 



long. 



JJ Flowers white. Cymes corymbose or 

 racemose. Sepals narrow and pointed. 

 Styles long and free helovj. Fruit 

 pyriform, 40 60 mm. long. Dwarf 

 shoots often thorny. 



Pyrus communis, L. Pear (Fig. 131). Small tree, with 

 elongated fruit. 



Flowers on long stalks, in corymboid or racemose 

 cymes of 6 12, giving off an odour of trimethylamine, 

 which attracts flies; proterogynous with half-exposed 

 honey. Calyx-tube enclosing and fusing with the 5 carpels. 

 Styles free. Calyx-teeth erect, then reflexed. Petals 

 rounded, white, clawed. Stamens with purple and eventu- 

 ally black anthers. Fruit narrowed below into the stalk ; 

 disc small, surrounded by the ring-like remains of the 

 calyx-teeth. Walls of chambers parchment-like, rounded 

 externally. The Pear is remarkable in culture for the 



