EXPLANATION OF TERMS 



The inner flower-cup or the inner set of leaves is the Corolla 

 (Fig. 6, C). 



When the corolla is divided into separate leaves, these leaves 

 are called Petals. 



We can look upon calyx and corolla as the natural tapestry 

 which protects the delicate organs of the flower, and serves as 

 well, in many cases, to attract the attention of passing insects. 

 In some flowers only one of these two parts is present ; in such 

 a case the single cup or set of floral leaves is generally considered 

 to be the calyx. 



The floral leaves may be spoken of collectively as the Peri- 

 anth. This word is used especially in describing members of 

 families where there might be difficulty in deciding as to whether 

 the single set of floral leaves present should be considered calyx 

 or corolla (see Lilies, Pis. XLV. and LXXX.) ; or where the 

 petals and sepals can only be distinguished with difficulty, as 

 with the Orchids. 



-O 



Fig. 7. Fig. 8. 



The Stamens (Fig. 7) are the fertilizing organs of the flower. 

 A stamen usually consists of two parts, its Filament (F), or stalk, 

 and its Anther (A), the little sac at the tip of the filament which 

 produces the dust-like, fertilizing substance called Pollen (p.). 



The Pistil (Fig. 8) is the seed-bearing organ of the flower. 

 When complete it consists of Ovary (O), Style (Sty.), and 

 Stigma (Stg.). 



The Ovary is the hollow portion at the base of the pistil. It 

 contains the ovules or rudimentary seeds which are quickened 

 into life by the pollen. 



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