364 DIOECIA. 



properly, even as the system stands at present, to 

 belong to the eighth Order, to great part of which 

 they are, moreover, naturally related. 



Class 22. Dioecia. Stamens and Pistils in separate 

 flowers, situated on two separate plants. Orders 8. 



The foregoing remarks on the Orders of Monoecia 

 apply also to those of this Class. I shall therefore only 

 briefly mention some genera properly illustrative of 

 each Order, more particularly specifying such as re- 

 quire to be placed elsewhere. 



1. Monandria. Brosimum of Swartz, and Ascarina 

 of Forster, seem, by their descriptions, to be well 

 placed here. Pandanus {Athrodactylis of Forster) 

 is more doubtful, not having any partial calyx or 

 corolla to divide the stamensinto separate blossoms, 

 so that the whole may be taken either for a polyan- 

 drous or a monadelphous flower, as well as for an 

 assemblage of monandrous ones. Najas is a good 

 and immutable example of this Order. Of Thun- 

 bergs Phelypcea I have not materials to form a 

 judgement. 



2. Diandria. The wonderful Vallsneria, Jacq. Eclog. 

 f. 1. already described/?. 9.55, is a decisive example 

 of this. Cecropia also seems unexceptionable. Of 

 Salix, see Engl. Bot. v. 20 and 21, &c., I have al- 

 ready spoken, p, S5^, The scales of its barren and 

 fertile catkins are alike; its nectaries various. 



