152 CLASSIFICATION OF [CH. 
“Yorkshire Fog,” of little use or importance, except that it is 
frequently found as an impurity of other hairy grasses—e.g. Alope- 
curus. 
It cannot easily be confounded with any other grass: Antho- 
zanthum and Alopecurus, Arrhenatherum, &c. present superficial 
resemblances only. 
These glumed hairy “ seeds’ 
recognised type. 
’] 
are uncommon and form an easily 
\ ¥ 
Fig. 65. Holcus lanatus. a, ‘‘ seed”—i.e. complete spikelet—and ditto 
devoid of glumes, nat. size; b, spikelet, and c the same devoid of 
glumes, x7. The ‘‘seed” is here composed of the keeled glumes 
enclosing two pairs of palew and their flowers (c): the upper of 
these is barren and has a hooked sub-terminal awn to its outer palea. 
The lower awnless one is fertile. Nobbe. 
Holcus lanatus, L. (Fig. 65). 
The “seed” consists of the complete spikelet, separated 
below the compressed and acute, keeled glumes; these 
have hairs on the keel, and completely enclose the two 
flowers and their palez. Palea ribless, white to grey, 
shining, obtuse, that of the upper (male) flower with a 
sub-terminal short hook-like awn. ‘Total length about 
4—5 mm. Caryopsis oblong-ovate, grooved. In its 
palea about 2—3 mm. long and with a few hairs at the 
base. 
