26 COMMON SEAWEEDS. 



ULVA. 



Generic character. — The frond (which means all 

 parts of a seaweed except its root) is a soft green 

 membrane, often inflated like a bladder. The name is 

 from a Celtic word, £77, water. 



TJlva Latissima — is a deep green weed, covering 

 the stones as well as the rocks as the tide recedes, 

 called by fishermen oyster green, because employed to 

 cover oysters. It is also called laver, as it is used by 

 epicures instead of the true laver, when JPorpliyra 

 cannot be procured, but it is by no means so good. 



TJlva Lactuca. — Somewhat like the former; but 

 although in its young state it is inflated or saccate, 

 ere long it bursts, becomes cleft, and is of a lighter 

 green. Both these very common seaweeds are beauti- 

 ful in the album when properly prepared. 



TJlva Linza. — We may not find this in the first- 

 tide pools, for it spreads out in delicate branches of 

 ribbon-like folds, an inch wide, a foot or more long, of 

 a rich bright green, tenderly green in the early summer,, 

 darker towards autumn. The fronds are waved and 

 plaited at the edge, and the shadings produced by 

 the curled margin add much to the beauty of this 

 plant. It requires delicate treatment, for it is very 

 thin, and must be floated quietly on the paper it is- 

 intended to adorn. Let the fronds spread naturally,. 



