33 GENERAL EEMABKS ON THE 



Serpicula differs from Myriophyllum in having only half 

 the number of stamina in the male flower, and m its 

 unilocular four-seeded ovarium. 



Hippuris, though retaining the habit of Myriophyllum, 

 yet having a monandrous hermaphrodite flower Avithout 

 petals, and a single-seeded ovarium, is less certainly redu- 

 cible to this order : and it may appear still more paradox- 

 ical to imite with it CallitricJie, in which, however, I am 

 inchned to consider what authors have denominated petals 

 as rather analogous to the bractese in the female flower of 

 Myriophyllum and Serpicula, and to both these genera 

 Callitriche in the structure of its pistillum, and even in 

 habit, very nearly approaches. 



The Australian genera of this order are Haloragis, Meio- 

 nectes, Myriophyllum, and Callitriche. 



Of Haloragis, many new species have been observed in 

 Terra Australis, in every part of which this genus is found, 

 most abundantly, however, at both extremities of the prin- 

 cipal parallel. 



That Gonocarpiis really belongs to the same genus, I am 

 satisfied from an examination of original specimens sent by 

 Thunberg himself, to Sir Joseph Banks, for in these 

 I find not only petals, but eight stamina and a quadrilocular 

 ovarium. 



LEGUMINOSiE.' This extensive tribe may be con- 

 sidered as a class divisible into at least three orders, to 

 651] which proper names should be given. Of the whole 

 class about 2000 species are at present published, and in 

 Terra Australis, where this is the most numerous family, 

 considerably more than 400 species have already been 

 observed. 



One of the three orders of Leguminosae which is here 

 for the first time proposed may be named Mimose^. It 

 consists of the Linnean Mimosa, recently subdivided 

 by Willdenow into five genera, along with Adenanthera 

 and Prosopis. 



' Juss. gen. 345. 



