AND TERICHjETIUM. 251 



present, even in different individuals of 

 the same species. 



* ( Unfortunately for the science^ 

 On the awn there 's no reliance." 



So says, or rather sings, with more truth 

 than sublimity, the ingenious author of 

 the Flora Londinensis ; fuse. 6, t. 8. 



The spiral kind of awn is most fre- 

 quently attached to the Corolla of grasses, 

 which is precisely of the same husky na- 

 ture as their calyx, and is, by some bota- 

 nists, considered as such. Specimens of 

 glumce mutie&i beardless husks, are seen 

 mPhalariscanariaisis, Engl. Hot. t. 1310, 

 and glumce arista tee, awned ones, in La- 

 gurus ovatus, t. 1334, and Stipa ' pe?inata, 

 t. 1356. 



Perichcetium. A scaly sheath, investing 

 the fertile flower, and consequently the base 

 of the fruit-stalk, in some Mosses. In the 

 genus Hypnum it is of great consequence, 

 not only by its presence, constituting a part 

 of the generic character, but by its dif- 

 ferences in shape 3 proportion, and struc- 



