18 AN INTRODUCTION 



The variations of the Calyx, in respect to figure, 

 will also include the terms respecting its Equality, 

 Margin and Ape.v, or Top. 



In respect to Figure, itiseither^/otee, globe-shaped, 

 as in Cucubalus; clavate, club-shaped, as in Silene; 

 reflex, bent back, as in Asclepias ; or erect, upright, 

 as in Primula and Nicotiana 



In respect to Equality, it is either equal, as in 

 Lychnis ; unequal, as in Helianthemum : or with the 

 segments alternately shorter, as in Tormentilia and 

 Potentilla. 



In respect to its Margin, it is either integer rimus, 

 very entire, as in most plants ; serrate, sawed, as in 

 some species of Hypericum ; or ciliate, fringed with 

 hairs like an eye-lash, as in some species of Centau- 

 rea. 



In respect to its Apex, or top, it is either acute, 

 sharp, as in Primula and Androsace; acuminate, point- 

 ed, as in Hyoscyamus ; obtuse, blunt, as in Nym- 

 phaea and Garcinia; or with one of its indents lopped 

 off, as in Verbena. 



In respect to Proportion, it is either longer than 

 the Corolla, as in Agrostemma, Sagina, and somespe- 

 cies of Antirrhinum ;, equal to it, as in some species 

 of Cerastium ; or shorter, as in Silene. 



In respect to Situation, it is either a Calyx of the 

 jloicer, as in Linnaea and Morina ; of the fruit, as in 

 Linnoea and Morina*, or of the Fructification, as in 

 Poeonia. 



The Duration of the Calyx may also be consider- 

 ed. In respect to which it is either caducous, falling 

 off at the first opening of the flower, as in Papaver 

 and Epimedium ; deciduous with the Corolla, as in 

 Berberis, and in the plants of the class Tetradyna- 

 mia; or persisting, till the fruit is come to maturity, 

 as in the plants of the class Didynamia. 



* The Linnaea and Morina have each of them two Calyces, 

 one of the llower, the other of the fruit -, which is the reason of 

 their being given as instances of both cases. 



