The Fascination of Flowers 



[293 



PETAL 

 (port of corolla) 



SEPAL 

 (part of calyx) 



STIGMA 

 STYLE 



pistil 

 (i rith 

 o retry 



ANTHER 

 (containing > 

 pollen) 



FILAMENT 



OVARY 



stai len 



A SEED-PRODUCING FACTORY 



All seeds are produced by flowers, but there is considerable variation in the forms 

 of flowers. Not all types have both male parts (stamens) and female (pistil) 

 within one blossom. Those that do are termed "perfect" flowers. This diagram of a 

 lily (shown with transparent petals and sepals) illustrates one of them. 



Here a difficulty arises: Not all flowers conform to the same 

 pattern. Suppose, then, we consider the simplest types. One of 

 these is the "perfect" flower such as the lily which has a pollen- 

 bearing stamen and an ovary in which seeds develop. 



The other simple type is a plant which bears two different 

 types of flowers the pussy willow is an example; one flower bears 

 only the pollen-laden stamens while the other flower bears the 

 ovary. In this case, we might call the flower with the stamens 



