290 



ORGANOGRAPHY. 



Fig. 627. 



Fig. 628. 



Fig. 627. Female flower of one of the EvpJiorbiacece, c. Calyx. p,p. Petals. 

 t. Membranous expansion round the ovary, o. Ovary, with three styles, s, 



each of which is twice forked Fig. 628. Ovary of Castor Oil Plant, 



iRicinvs communis). The styles in this case are once forked. 



style. This adhesion may take place either entirely, as in the 

 Primrose {fig. 567), when the style is improperly termed simple, 

 (undivided or entire would be a better term) ; or the union is 

 more or less incomplete as we proceed towards its apex, and 

 corresponding terms are used accordingly ; these are similar to 

 those previously mentioned in describing the degree of division 

 of the other parts of the plant. Thus it is said to be cleft, when 

 the union between the component styles extends to at least mid- 

 way between their base and apex, and the style is said to be 

 bifid, trifid, quadrifid, quinquefid, or mult/fid, according as it is 

 two, three, four, five, or many-cleft. If the union between the 

 component styles does not extend to midway between their 

 base and apex, the style is partite, and is described as bipartite, 

 tripartite, quadripartite, &c., according to the number of par- 

 titions. 



Forvi and Surface. — In form the style is generally more or 

 less cylindrical ; and either tapering from the base to the apex, 

 as is more frequently the case, or becoming enlarged as it pro- 

 ceeds upwards. At other times the style is filiform, or more 

 or less thickened, or angular ; and rarely thin, coloured, and 

 flattened like a petal, as in Canna, and Iris {fig. 629): it is then 

 said to be petaloid. 



Tiie surface of the style may be either smooth, or covered 

 in various ways with glands and hairs. These hairs when situ- 

 ated on the style, frequently serve the purpose of collecting the 

 I)ollcn as it is discharged from the anther, and arc hence termed 



