96 



Principles of Plant Culture. 



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 



FIG. 46. Flower of the pea, Pisum sativum. (After - ,- m^ 



Baillon). eacn otn er. 



FIG. 47. The same dissected, showing variation stamens (Fig. 48 

 in form of the petals. (After Figuier). 



FIG. 



FIG. 47. 



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

 from those of the cherry. The variety 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 have no corolla; those of the willow 

 have neither calyx nor corolla; 



certain flowers of the pump- 

 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 (coni-pos'- 

 ite) Flowers t are made up of 



FIG. 48. - FIG. 49. 



several individual flowers in FIG. 48. stamens (st) and pistil 

 the same flower-head. The of the pea, PI* M ,, *//>H. 



FIG. 49. Pistil of same alone. 

 SUn-flower (Fig. 50) IS a ( After Baillon). 



* Prunus Americana, P. angustifolia, P, hortulano. 



f The plants having composite flowers form an extensive family in 

 botany, called Compositce. 



