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General Botany 



Fig. 147. A tropical orchid {Lcelia). The perianth consists of three sepals and three petals, 

 one of which is greatly modified. 



whorl of white or brightly colored leaves that make up the corolla. 

 The several parts of the corolla are called petals. The corolla is 

 usually the attactively colored part of the flower, but in some 

 flowers, as in the tulip and clematis, the sepals have the same 

 coloring as the petals. The calyx and corolla are often spoken 

 of as the floral envelopes, because in the bud they form a wrapping, 

 or envelope, for the inner parts of the flower. 



Inside the corolla is a group of stamens, each composed of a 

 stalk-like filament and an anther, that contains the pollen. The 

 center of the flower is occupied by one or more pistils, each made 

 up of an ovulary, style, and stigma. The ovulary is the enlarged 

 part of the pistil that contains the ovules, which develop into the 

 seeds. The style is the stalk above the ovulary that bears at its 

 summit the stigma. The stigma is usually an enlarged surface, 

 which secretes a sticky, sugary solution in which the pollen grains 



