6a NOMENCLATURE. 



to them, when it is called calyx corollinus. This last we find 

 m the Polygoneae, Chenopodeju, and many other plants ; and 

 in Sesuvium, the separation of the two covers is so much in 

 the act of taking place, that they seem to be merely attached 

 tt) «ach other. 



The separate pai-ts of the calyx are called sepaJa. 



V. The Fhwer, 



90. 



The interior, coloured, and for the most part short-lived 

 cover of the parts of fructification, is called the corolla (corol- 

 la). This, as was formerly mentioned, often passes into the 

 exterior cover, and in particular it is called cwolla calychia^ 

 when it has indeed an integument resembling the calyx ; but 

 is still entirely a corolla. This is the case in the Liliaceae 

 and Coronariae. There is often merely a simple appendage 

 to the corolla, in some scattered leaves, as in Aponogeton ; 

 (Tab. II. Fig. 11.) 



91. 



The corolla consists either of one or of several distinct parts. 

 The division of the corolla may be known by looking at its 

 base, and observing whether its parts are connected with each 

 other or whether they are distinct. 



When the parts of the corolla are separate, they are called 

 petala ; and from this we perceive the meaning of the terms 

 Ji-, trU, tetra-, penta^, and polypetala corolla. 



When the parts of the corolla are connected with each 

 other, they are called lobes {lobi)^ segments (laci7ua), or lips 

 (labia), which expressions have been partly explained already 

 and will be more fully defined. 



A corolla, of which the parts are united, forms a tube (^w- 

 bns) or the hollow cylinder, which unites the parts : the ex- 

 panded lobes form the border (limbus) ; and the junction of 

 this, with the former, is called the throat (faux). 



