I02 



Elementary Botany 



said to be monoecious ; if they grow upon separate plants, as 

 in the Willow (fig. 163), Juniper, and Poplar, it is dioecious ; 

 whilst if on the same plant are to be found hermaphrodite, 

 staminate, and pistillate flowers, as in the Ash, it is polygamous. 

 We must now notice each part of the flower more par- 

 ticularly. 



Fig. 163.— Sallow (5'a/!;trca^?'ea). I. Male catkin. II. Female catkin. 



Fig. 164.— Flower of the 

 Strawberry, with calyx 

 in two rows. 



Fig. 165.— Longitudinal section through the 

 flower of Ranunculus acris, showing the 

 hypogynous calyx, corolla, and stamens. 



Calyx.— The sepals are generally arranged in one whorl, 

 but in some cases, as in the Strawberry (fig. 164), there may 

 be two (or even, as in the Cotton, three) whorls. 



Generally the sepals are green, but sometimes, as in the 

 Fuchsia, Larkspur, and Garden Nasturtium, they are coloured, 

 or petalpi^. 



