48 Botanical Section [PT i 



Festuca ovina tenuifolia, O.P. 2-4 mm. long, with 

 acute apex, brown in colour. Rachilla 

 outstanding. (Fig. 103.) 



Agroslis alba var. stolonifera (p. 54), in bulk of a pale 

 silvery-fawn colour. O.P. 1-3-2-0 mm. 

 long; paleae very thin and silvery- 

 white, lower empty glume with its 

 keel serrated throughout its entire 

 length (some empty glumes are always 

 present). (Fig. 34.) 



A. alba var. vulgaris, as above but slightly smaller 



"seed," and lower empty glume ser- 

 rated only on the upper half of its keel. 

 Seen in bulk the "seed" is of a darker 

 colour. (Fig. 35.) 



Glyceria aquatica, 0. P. 3-4 mm. long, 7-nerved ; 

 rachilla less enlarged at the top than 

 in G. fluitans. (Fig. 111.) 



Milium effusum, O.P. about 3 mm. long ; inner palea 

 hard and shining. (Fig. 129.) 



Digraphis arundinacea, 0. P. about 3 mm. long, 

 glossy, with a pair of linear hair-tufts 

 at its base. (Fig. 92.) 



Holcus lanatus, "seed" (when free from the glumes) 

 2-2-5 mm. long; paleae greyish- white, 

 shining. (Fig. 114.) 



H. mollis, when free from the glumes, also comes 

 here. It can then only be distinguished 

 from H. lanatus by the awn of the 

 upper flower if the latter is attached, 

 see p. 108. (Fig. 116.) 

 " Seeds " of the following three species may sometimes come here. 



Cynosurus cristatus } ~ _ _ 



? 7 . . , O.P. 3-4 mm. long and taper- 



Molima ccerulea . , , ~ TT . 



T , 7 . . pointed (see Group II). 



Rosier la cnstata } 



(b) O.P. inflated, with membranous winged margins. 



Briza media, O.P. 2-5-3 mm. long. (Fig. 69.) 



B. minor has a similar but smaller "seed." 



