ORGANS OF EEPBODrCTION. 



281 



Fki. 624. One of the carpels of the 

 Strawl)erry with a lateral style. 



Fig. 625. Carpel of Akhe- 



viilla with a basilar style. The 

 stigma is capitate. 



are certain other matters connected with it still to be alluded 

 to. 



The style generally arises from the geometrical summit of 

 the ovary, of which it is a continuation in an upward direction, 

 as in the Primrose (fi^. 567); it is then termed apicilar or apical. 

 In other cases, the apex of the 



ovary becomes inflected towards ^^" ^^" ^^9- °25. 



the side or base, from the carpel 

 or carpels of which it is formed 

 being folded like ordinary leaves 

 in reclinate vernation, the style 

 then becomes lateral, as in the 

 Strawberry (Jig. 624), or basilar, 

 as in AlchemUla {fig. 625). In 

 the two latter cases, therefore, 

 the geometrical and organic apices 

 of the ovary do not correspond, as 

 the point of origin of the style al- 

 ways determines the latter. 



The style is generally directly 

 continuous with the ovary, which 

 gradually tapers upwards to it, as 

 in Digitalis, in which case it is more or less persistent, and then 

 it sometimes forms a part of the fruit ; at other times, however, 

 there is a kind of contraction or species of articulation at the 

 point where the style springs from the ovary, 

 as in Scirpus, and then the style always 

 falls off after the process of fertilization is 

 completed, in which case it is said to be 

 deciduous. 



When the style is basilar or lateral, and 

 the ovary to which it is attached more or 

 less imbedded in the thalamus, it frequently 

 appears to spring from the latter part ; such 

 an arrangement is called a gynohase, and the 

 ovary is said to be gynohasic. In the La- 

 biatse {fig. 595), and Boraginacese {fig, 596), 

 the four ovaries are free, but the styles be- 

 come connected and form a central column, 

 which appears therefore to be a prolongation 

 of the thalamus. 



Such an arrangement must not be con- 

 founded with that of the ovaries and styles of 

 the species of Gcranium{fig. 626), and some 

 other plants, where the axis is prolonged in 

 the form of a beak-like process, to which the ^fS'a IJedesTS 

 ovaries and styles become united, and from nium, with the roiied- 

 which they separate when the fruit is ripe. ^^^^^^^'^^'^^^ '^«^- 

 This prolongation of the thalamus is termed a carjpojphore. 



Fig. 626. 



