96 



Principles of Plant Culture. 



Fig. 46. Fig. 47. 



Fie. 46. Flower of the pea, Pisum satin 



146. The Parts of the Flower Vary in Form in different 

 species. In the pea flower (Fig. 46) the five petals, 



shown separate- 

 ly in Fig. 47, 

 are not only 

 quite unlike the 

 petals of the 

 cherry flower, 

 but, as appears, 

 they are unlike 

 ^ .„ , '•^^^^' each other. The 



Baillon). 



Fk;. 47. The same dissected, showing variation stanienS (Fig. 48 

 in form of the petals. (After Flguier). g^_ s, ^^^ ^^^ p-^. 



til (Fig. 49; of the pea are also quite different in form 

 from those of the cherry. The varietj' of form in the 

 parts of the flowers of different species is almost infinite. 



147. Certain Parts of the Flower are often Wanting. The 

 flowers of the maple haw no corolla; those of the willow 

 have neither calyx nor corolla; 

 certain flowers of the pumiJ- 

 kin, Indian corn and many 

 other plants have no stamens, 

 while other flowers of the 

 same species have no pistils 

 (154). In many varieties of 

 the American plums* the pis- 

 til is often wanting. 



148. Composite (com-pos'- 

 ite ) Flowers f are made up of 

 several individual flowers in 

 the same flower-head. The 

 sun-flower (Fig. 50) is a 



* Primus Americana, P. angustifolia, P. hortulana. 



t The plants having composite flowers form an extensive family In 

 botany, called Compi>.iili.i'. 



Fig. 48. Fig. 4!t. 



Fig. 4s. Stamens (st) and plstU 

 of the pea, Pisurn sativum. 



Fig. 49. Pistil of same alone. 

 (After Baillon). 



