ORDER LICHENES. 



273 



You are here presented (Fig. 130) with a delineation of three 

 kinds of Fuci. (a) Fucus nodosus (knobbed fucus), this has 



Fig. 130. 



forked fronds. The knobs which appear in the fronds, are air- 

 bladders, which render it peculiarly buoyant upon the water. 

 This is often more than six feet long, (b) Fucus vesiculosus 

 (bladder fucus) ; here the air-bladders are mostly axillary, and 

 at the sides of the mid-rib. It varies in length from one to 

 four feet. On account of its mucilaginous property it forms a 

 good manure ; and in some of the countries of Lapland it is 

 boiled with meal, and given for food to cattle, (c) Fucus ser- 

 ratus has a beautiful, serrate or notched frond. 



The Fuci, on burning, afford an impure soda called Jeefy. 



Lichenes, or LICHENS. 



The 5th order contains the LICHENS ; these are various in 

 texture, form and colour; they are leathery, woody, leaf-like, 

 white, yellow, green and tilack. When wet, they often appear 

 like green herbage ; some appear on stones or old fences and 

 buildings ; others with strong green filaments, are suspended 

 from branches of trees and improperly called mosses. The 

 fruit of the lichen consists of tubercles, or saucer-like bodies, 

 in which the seeds are contained ; this may be seen in the 



Delineation of three kinds of Fuci Kelp Lichens Of what the fruit 

 consists. 



