CRESTED DOGSTAIL 



669 



It should be 70 per cent, but those containing 50 per cent, of 

 living seeds may be considered good. 



Weight. — 1000 good seeds weigh about '48 gram., 

 the bushel-weight being 12 lbs. 



Tall Oat-Grrass : French Rye-Grass. — (Arrhena- 

 therum avenaceum Beauv. = y^twzrt elatior L.). 



Form, Size and Colour. — The commercial 

 seeds of this grass consist of complete spikelets 

 without the empty glumes. Two florets are present 

 in each, the lower one is male only and has a 

 flowering glume with a strong twisted and bent awn 

 which arises a little above the fringed base of the 

 seed : the upper floret is fertile and produces a pale 

 brown caryopsis, hairy at the tip, its flowering glume 

 has a straight more slender and shorter awn which -gio. 214.— Seed 

 grows from a point near the apex. trZ^ln a^ul^ 



Tiie whole ' seed ' is nearly the size and colour "^oa°-r;rass°" 

 of a small ordinary white oat, about 8 mm. long and samples. 

 I '5 mm. broad. The larger awn is dark brown with a spiral band 

 of paler tint around it. 



Purity. — This is generally good and should be at 

 least 98 per cent. 



The Germination Capacity of good samples reaches 

 80 per cent., and the weight of 1000 seeds should be 

 not much less than 3 '5 grams. 



Bushel-weight 14 lbs. 



Crested Dogstail {Cynosinus crislatus L.). 



Form, Size, and Colour. — The flowering glume of 

 the seed is strong and opaque, drawn out at its tip to 

 a rigid point which is slightly curved on one side. Its 

 upper part is keeled and covered with short stiff whitish Fig 215.— 

 bristles,the lower part being smoother. The colour varies crMted 

 from orange yellow to deep rich brown ; length about 4 '"sstai . 

 mm., breadth '9 mm. The rachilla is short with a broad flattened 

 top. 



