42 AN INTRODUCTION 



shaped, as in Crocus; angulate, cornered, as in 

 Tulipa ; cornute, horned, as in Hamamelis, Erica, 

 Vaccinium and Pyrola. 



They burst either on the side, as in Leuooium, and 

 most flowers ; on the apex, as in Galanthus and Kig- 

 gellaria ; or from the apex to the base through the 

 whole length, as in Epimedium and Leontice. 



They are fastened either by their base, as in most 

 plants; their tops, as in Colchicum ; their sides, . as 

 in Canna ; or grow to the Nectarium, as in Costus. 



Their situation is either on the tops of the fila- 

 ments, as in most plants; on \htsides of the filaments, 

 as in Paris and Asarum ; on the pist ilium, as in Aris- 

 tolochia ; or on the receptacle, as in Arum. 



The Figure of the particles of the Pollen appears 

 by glasses to be either Globus echmatus, a prickly ball, 

 as in Helianthus ; perforate, as in Geranium ; double, 

 as in Symphytum; rotato-dentate, wheel- shaped and 

 indented, as in Mai va; ungulate, cornered, as in Viola; 

 reniform, Kidney-shaped, as in Narcissus ; or Folia 

 Convoluta, a leaf rolled up, as in Borrago. 



CHAP. XIV. 



OF THE DIFFERENT STRUCTURES OF THE PlSTIL- 



LUM. 



THE Pistillum consists of three parts, Germen, 

 Stylus, and Stigma : of these the germen being no 

 other than the rudiment of the pericarpium, its va- 

 riations will be considered under that head in the 

 next chapter ; nor need we speak here of the num- 

 ber of the styles, as that will be treated of in the ex- 

 planation of the Sexual System*; but as the style is 

 often divided, we must consider its Laciniae. 



* See Part II. Chap. 3, in which the titles of the Orders, which 

 are governed chiefly by the number of the styles, are explained. 



