IX J "seeds' 151 



Bactylis glomerata, L. (Fig. 64). 



Stiff awn-point just below the two teeth of apex of 

 pale. Rachilla dilated above. Palese 5 — 6 mm. long 

 exclusive of point, compressed and inflated, ribbed and 

 ciliate-bristly on keel, the tip incurved. Caryopsis yellow- 

 brown, ellipsoid, 2 mm. 



An important grass, said to be adulterated with Lolmm, Fescues, 

 Holcus^ MoUnla, Bro7nus^ &c., most of which should be readily 

 detected. The curved tip is an important distinctive character. 

 Cynosurus and Festuca arundinacea, F. ovina and F. rubra present 

 resemblances. The seed is larger than that of Poa. 



F. ovina and F. rubra are smaller, rounded dorsally, and have no 

 keel or cilia : the nerves are less prominent and the rachilla smaller. 



Sesleria ccBrulea, Ard. 



Palea distinctly toothed at the apex, making it almost 

 three-lobed and very characteristic ; with awn-point ; live 

 ribs, serrulate. Fruit grey-yellow, obovate. 



It is a mountain- and moor-grass of little value. 



B. "Seed" awned— i.e. the investing palea bears, or 

 tapers into, a distinct bristle or hair at least as 

 long as itself or nearly so. 



{a) Awn not terminal. 



(1) Awn stout, either obviously tiuisted and bent 

 or '^ kneed." 

 (i) " Seed " consisting of the glumes as well as palese 

 investing the caryopsis ^. 

 © Aion bent but not twisted ; glumes free below, 

 ribbed, and icith stiff short hairs on the keel. 

 = Awn sub-terminal, shorter than the palea, 

 ^0^^^^- Holcas lanatus. 



1 In cases where the '* seed " has fallen from the glumes the sample 

 will usuaUy show some of the latter lying loose. 



