CH. vi] Key to Grass "Seeds" 43 



A. pratensis (p. 59), glumes about 5 mm. 

 long, covered with, long silky hairs 

 especially at their edges. (Fig. 45.) 



A. agrestis (p. 61), glumes about 6 mm. long, 

 bearing much shorter and fewer hairs 

 than A. pratensis. (Fig. 48.) 



A. geniculatus, glumes about 2-5 mm. long. 



(Fig. 50.) 

 (y) Both palece present = Holcus. 



H. mollis (p. 108), glumes 5-6 mm. long, 

 both acutely pointed and hairy on the 

 nerves. O.P. of lower flower (con- 

 taining grain) awnless; O.P. of upper 

 (staminate) flower bears an awn which 

 arises from a point about three-fourths 

 the distance up the O.P. ; the awn is 

 finely serrated throughout its entire 

 length. (Fig. 116.) 



H. lanatus(p. 106), very like H. mollis, but glumes 

 4-5 mm. long, more hairy, the upper 

 one broader than the other and tipped 

 with a short awn-point. The awn is 

 almost sub-terminal, is rough (serrated) 

 only towards its point, and is distinctly 

 curved or hook-like. (Fig. 114.) 

 2. "Seed" consisting of the palece enveloping the grain, and 



without the glumes attached, 

 (a) Awn twisted and bent. 



Avena fatua, O.P. about 13-15 mm. long by 

 3 mm. broad ; rachilla bearing fine 

 long bristly hairs. Basal hair-tuft 

 below palese. (Fig. 62.) 



A. strigosa, O.P. 12 mm. or more in length. 

 Only the O.P. of lower "seed" of 

 spikelet is awned. Kachilla almost or 

 quite glabrous. 



A. pratensis (p. 70), O.P. about 9 mm. long, of 

 light straw colour, with basal hair-tuft. 



