ARTIFICIAL METHOD. 2.57 



"225* Fructification in cones The Horsetail Tr. 



Fructification axillary and solitary The Chara Tr. 



226. Plants with distinct leaves . 227 

 Plants mere leafless expansions . 230 



227. Fructification growing on the back of the 



leaves . . The Fern Tr. 



Fructification distinct from the leaves 228 



228. Seed-vessel sessile in the axils of leaves 



The Club-moss Tr. 

 Seed-vessel on stalks . . 229 



229. Seed-vessel with a lid and calyptra The Moss Tr. 

 Seed-vessel without lid and calyptra 



The Jungermannla Tr. 



230. Seed-vessel opening into valves Jungermannia Tr. 

 Seed-vessel without valves . 231 



231. Seed-vessel stalked and external Marchantia Tr. 

 Seed-vessel stalkless and usually internal 232 



232. Growing under water The Sea-weed Tr. 

 Growing in the air . . 233 



9,SS. Fructification in external shields The Lichen Tr. 

 Fructification in internal cases The Mushroom Tr. 



VOL. 11. 



