IX] " SEEDS " 161 



Bactylis glomerata, L. (Fig. 64). 



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

 pale. Eachilla 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 Lolium, Fescues, 

 Holcus, Molinia, Bromus, &o., most of which should be readily 

 detected. The curved tip is an important distinctive character. 

 Cynosv/rus and Festiica arwidinacea, 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 cmrulea, Ard. 



Palea distinctly toothed at the apex, making it almost 

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

 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 twisted and bent 

 or " kneed." 

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

 investing the caryopsis '. 

 Awn bent but not twisted ; glumes free below, 

 ribbed, and with stiff short hairs on the heel. 

 = Awn sub-terminal, shorter than the palea, 

 ^°''^'^- Holcus lanatus. 



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

 will usually show some of the latter lying loose. 



