The Discoveries of Four Great botanists 



Fig. 



construction of a flower, but in order to insure such 

 comprehension, it is well, perhaps, to freshen our 

 memory by reference to 

 the accompanying dia- 

 gram. Fig. I, of an ab- 

 stract flower, the various 

 parts being indexed. 



The calyx usually en- 

 closes the bud, and mav be 

 tubular or composed of 



separate leaves or sepals, as in a rose. The corolla, 

 or colored portion, may consist of several petals, as 

 in the rose, or of a single one, as in the morning- 

 glory. At the centre is the pistil, or pistils, which 

 form the ultimate fruit. The pistil is divided into 

 three parts — ovary, style, and stigma. Surround- 

 ing the pistil are the stamens, few or many, the 

 anther at the extremity containing the powdery 

 pollen. 



The botanists of a thousand years ago could have 

 readily named these parts, but regarding their rela- 

 tion to each other, they could have told you nothing. 



GREIV EXPLAIXS THE RELATION OF STAMENS AND PISTILS 



The first observer to give to the world any in- 

 formation on this subject was Nehemias Grew, who 

 announced m 1682 that it was necessary for the 



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