numerous where the atmosphere is dry and the elim: 
warm. They are frequent on the roots and trunks of t , 
and are supposed to defend them against the cold of winter, — 
the burning heat of the sun, and the effects of too much 
Mepicinan Properties.—Polytrichum commune was at 
_ one time used as a sudorific, and some of the mosses have 
been supposed astringent. At present none are used in me- 
FILICOIDEZ. 
Possess @ Vascular System. 
ORDERS. 
_ vu. Marstteacez, vir. Lycoropiaces, 1x. FILIces- 
x. EQuIsETACER. 2 
es a MARSILEACEA, 
= aiadel the Filices, Linn, and Juss.—Rhizospermee, De 
