42 Botanical Section [pt i 



much inflated, bifid at apex, and 



usually hairy; awn about as long as 



O.P. (p. 81). 

 B. arvensis (Fig. 68), like B. mollis, but the whole 



"seed" usually more glabrous (p. 79). 

 B. asper (Fig. 78), O.P. 10-14 mm. long, with short 



bristly hairs on its lower part. Awn 



rough, straight and about half as long 



as the O.P. (p. 85). 

 Holcus mollis (Fig. 116) (may come here, but see p. 43). 

 4. Awn (or sub-terminal awn-point) not more than half 



as long as the O.P. 

 Sesleria ccerulea (may come here, see p. 131). 

 Holcus lanatus (Fig. 114), see pp. 43, 106. 

 C. Awn dorsal, arising a considerable distance below the apex, 



but distinctly above the base of the O.P. 

 1. "Seed" consisting of the one-" seeded" spikelets with the 



glumes attached. 



(a) '''Seed" with two awns, one straight, the other 



twisted and bent. 



Anihoxanthum odoratum (Fig. 52) (p. 61), the 

 awn-bearing glumes (3-4 mm. long) 

 have silvery-white summits, and are 

 covered with hairs of a deep rich brown 

 hue. 



A. Puelii, the hair on the awn-bearing glumes 

 is of a paler brown colour, and the 

 palese are also of a lighter colour than 

 in A. odoratum. (See p. 139.) 



N.B. "Seeds" of Arrhenafherum often have 

 two awns, but the palese of two flowers 

 are present, and the empty glumes 

 have fallen. 



(b) "Seed" with O.P. bearing one awn, which is more 



or less bent. 

 (x) Inner palea wanting, awn attached to 

 lower part of back of O.P. = Alope- 

 curus. 



