SECT. I. THE FLOWER. 8? 



names will be introduced in their proper places, 

 and the calyx of perfect plants discriminated into 

 the three following species : the perianth, the Species, 

 glume, and the scale. 



ARTICLE!. The Perianth. The perianth, which 

 is by far the most common species of calyx, and 

 like the leaf very generally green, invests the flower 

 immediately, so as to constitute a part of it, and 

 to form a sort of circular integument slightly re- 

 sembling a cup. From this resemblance it is fre- 

 quently, and sometimes also accurately enough, de- 

 nominated the flower cup, as may be examplified 

 in the case of the Acorn, the perianth of which 

 constitutes a perfect cup. 



The perianth, or cup investing the flower, is 

 either proper or common. It is proper if it con- 

 stitutes with the contained parts only a single 

 flower, as in Primula (PL IV. Fig. 1.), and 

 common if with the contained parts it consti- 

 tutes more than a single flower, as in Tragopogon. 

 (PL IV. Fig. 2.) 



The proper perianth or calyx consists either of Proper, 

 one individual piece, as in the Primrose; or of 

 several distinct pieces, as in the genus Rumev. If 

 it consists of a single piece it is said to be mono- 

 phyllous ; and if of more than a single piece it is 

 said to be diphyllous, triphyllus, or tetraphyllous, 

 according to the number of distinct pieces of which 

 it may happen to consist. ' 



