SECT. III. GEMS. 415 



waxy appearance; in some of the Contorts it is 

 viscid ; and in most of the Apocynece it is almost 

 altogether a fluid. But if this is the case even with 

 some terrestrial plants, much more with aquatics 

 vegetating in a medium so ill adapted to the trans- 

 mission of a farinaceous pollen. It follows, there- 

 fore, that the mucilaginous vesicles of the submersed 

 Alga surrounding the uterus are anthers furnished 

 with pollen, and that the grains by which they are 

 propagated are perfect seed, the flowers being thus 

 Hermaphrodites : which conclusion is further coun- 

 tenanced by the fact that the parts here alluded to 

 are merely temporary, the grains after fecundation 

 increasing and finally disengaging themselves, and 

 the mucous substance totally disappearing, as in 

 plants with conspicuous flowers. 



Such is the view of the subject offered by Mr. Its issue, 

 Correa, extremely perspicuous indeed, and almost 

 convincing. But it must at the same time be ob- 

 served that in his reply to the first of Gaertner's 

 arguments he adduces no examples in proof of his 

 assertions ; and does not even pretend to have dis- 

 covered the placentation of the grains; but merely 

 concludes that they must be so affixed. In his 

 reply to the second argument of Gaertner I am not 

 at all satisfied that the case is correctly stated. 

 Because although the scales of the bud are indeed 

 left behind, yet they do not at all come under the 

 notion of proper integuments as understood by 

 Gaertner ; but merely of an exterior covering or 



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