227 



IN the present Work there are several species not enumerated, some being, of 

 doubtful origin, and others so exceedingly rare as scarcely to be procured: 

 they are mentioned briefly in the addenda. At the conclusion of this Work 

 the author intended to have commenced a Natural History of those Foreign 

 Grasses that were remarkable for their beauty, singularity, or economic values; 

 this latter Work, however, will be deferred, as the author cannot devote the 

 time requisite for this undertaking at the present moment. In order to dis- 

 tinguish the species of British Grasses, the author has appended a 



COMPAKATIVE ANALYSIS, 



ARRANGED BY MR. RALFS. 



ORDER I. MONOGYNIA. One style. 



Stigma one ...... Nardus. 



Stigmas two ...... Some Grasses. 



CLASS II. DIANDRIA. Two styles. 



ORDER II. DIGYNIA. Two styles. 



Calyx single-flowered ..... Anthoxanthum. 

 Calyx two or more flowered . . . Some Grasses. 



DIANDRIA. Digynia. 



ANTHOXANTHUM . 



Calyx valves very unequal . . . . Odoratum. 



CLASS III. TRIANDRIA. Three stamens. 



1. Flowers spiked ..... 

 Flowers panicled . . . . .12 



2. Flowers in unilateral spikes 



Flowrs not unilateral . . .6 



