SPECIES AND VARIETIES. 183 



XX Pales awnless. 



(332) Briza — panicle loose ; spikelets cordate ; glumes two^ 



equal, convex, about as long as the lower florets ; pales 

 two, awnless, the outer boat-shaped ; stamens three ; 

 styles two. 



(333) Poa — panicle loose, seldom contracted ; spikelets two- or 



many-flowered, ovate ; glumes two, rather unequal, usually 

 keeled; pales two, nearly equal, awnless, scarious at 

 top ; stamens three ; styles two. 



(334) Glyceria — panicle loose; spikelets cylindrical; glumes 



two, nearly equal, obtuse ; pales two, nearly equal, awn- 

 less ; stamens three ; styles two. 



(335) Catabrosa — panicle loose ; spikelets two-flowered ; glumes 



two, unequal, rounded or truncate, much shorter than 

 the florets ; pales two, nearly equal, truncate, awnless ; 

 stamens three ; styles two. 



(336) Melica — panicle loose ; spikelets ovate ; glumes two, nearly 



equal, about as long as the florets ; pales two, unequal, 

 awnless ; stamens three; styles two. 



(337) Arundo — panicle loose ; spikelets many-flowered, the lower 



floret male and naked, the upper hermaphrodite and sur- 

 rounded by hairs ; glumes two, the lower smaller, the 

 upper about as long as the florets ; pales two, unequal, 

 pointed ; stamens three ; styles two. 



[III.— SPECIES AND VARIETIES.] 



(1) Clematis. Traveller's Joy. 

 C. Vitalba : climbing shrub ; leaves pinnate, -with about 

 five cordately-ovate stalked leaflets, the stalks forming tendrils ; 

 flowers greenish- white, in loose panicles; carpels with long 



