82 



NATURAL HISTORY OF PLANTS. 



a spiral and imbricated in the bud. 1 The stamens, also indefinite, 

 are hypogynous, dissimilar, 2 each formed of a free filament and an 

 introrse two-celled anther, dehiscing by two longitudinal clefts. 3 

 The superior gynseceum consists of a many-celled ovary, surmounted 



Nuphar hdeum. 



Fig. 87. 

 Flower (f ). 



Fig. 90. 

 Fruit (i). 



Fig. 89. 

 Long. sect, of flower. 



Fig. 91. 

 Seed (f). 



Fig. 88. 

 Diagram. 



Fig. 92. 

 Long. sect, of seed. 



by a style, whose expanded surface bears as many stigmatiferous 

 rays as there are cells. These last contain each an indefinite number 



1 Payee (Traite d'Organog. Compar., 269, t. 

 59) has studied the development and arrange- 

 ment of these leaves ; he admits that at least the 

 greater part are metamorphosed stamens, and 

 that the flowers are double, as in Nymphcea. In 

 fact, we see on the inner surface of the innermost 

 petals, shorter and fleshier than the rest, two 



projections, which look like representatives of 

 anther-ceDs. 



2 The more internal they are the narrower are 

 their filaments, and the closer together their 

 anther-cells. 



3 The pollen is at first elliptical (Tr£c, loc. 

 cit., 324) ; later on its grains become rounded, 

 and bristle with couical points. 



