THE MARINE BOTANIST. 39 



long, when full grown j in some plants fifteen feet 

 in length. Colour olive green, with a glossy 

 appearance, as if varnished ; substance of the frond 

 more tender than in Laminaria digitata. Grows 

 in deep water and on rocks at low-watej* mark. 

 Perennial. Autumn. 



LAMINARIA SACGHARINA— SWEET LA- 

 MINARIA— SEA-BELT. 



Stem cylindrical, filiform, slender. Frond undi- 

 vided. Margin waved. Substance variable; in 

 young specimens thin and delicate, in others 

 tough and leathery. Colour olive green, or yellow- 

 ish green. The fi:*onds are from two to twelve 

 feet in length, and fi'om four to sixteen inches wide. 

 In the variety /3 latifoliaj the fronds are very broad, 

 and the substance is more membranaceous than in 

 the ordinary form. This variety grows in deep 

 water in sheltered bays. 



