Page:An introduction to physiological and systematical botany (1st edition).djvu/510

 480 either for a polyandrous or a monadelphous flower, as well as for an assemblage of monandrous ones. Najas is a good and immutable example of this Order. Of Thunberg's Phelypæa I have not materials to form a judgment.

2. Diandria. The wonderful Valisneria, already described p. 335, is a decisive example of this. Cecropia also seems unexceptionable. Of Salix, see ''Engl. Bot. v. 20 and 21, &c., I have already spoken, p.'' 471. The scales of its barren and fertile catkins are alike; its nectaries various.

3. Triandria. Elegia and Restio, hard rushy plants chiefly of the Cape of Good Hope and New Holland, appear to bewithout any difference in the accessory parts of their flowers, which is certainly the case with Empetrum, ''Engl. Bot. t. 526, Ruscus, t. 560, brought hither from Dioecia Syngenesia, Osyris, Excœcaria and Maba; Caturus'' only seeming differently constructed in this particular; but I have not been able to examine the three last.