96 SEA MOSSES. 



exquisite beauty. This plant is very common on the 

 Atlantic cOEist north of New York city, also on the 

 Pacific. 



Laminaria longicruris, de la Pyl. 



The ^ong siemed Laminaria is a plant which in our 

 New England waters grows to about the size of L. 

 saccarhina, except as to the stem which is usually 

 quite as long as the blade of the plant. The whole, 

 therefore, is from twelve to sixteen feet long, and I 

 have found it at Marblehead eighteen to twenty feet 

 long, the blade twelve to sixteen inches wide. Harvey 

 says he found plants at Halifax, whose blade was two 

 to three feet wide. The hold-fast, as in the last species, 

 is composed of a number of stout roots, put out by 

 the stem at the bottom. The stem is very slender 

 and solid at that point, but toward the middle swells 

 to the diameter of an inch or more, and become 

 hollow. It tapers also toward the blade to a diam- 

 eter of half an inch. Altogether, the stem will be 

 found from six to ten feet long in the full grown plant 

 The blade is much the shape and color of the wide 

 forms of Z. saccarhina. It grows in deeper water 

 than that species, and may be found in from five to 

 ten fathoms or more. It is very abundant from Green- 

 land to Cape Cod, and in the North Pacific 



