OLIVE COLORED ALGAE. 89 



account of its habits to the celebrated botanist who 

 has done so much to illustrate the marine flora of 

 the North Pacific, Dr. Ruprecht. 



This plant more nearly approaches the Alaria than 

 any other of the Laminariea. Fastened to the rock 

 by a multitude of prongs which radiate from the base 

 of the stem, the stem itself rises two or three feet, 

 half an inch thick, mostly quite cylindrical, but flattened 

 near the top, where it gives off the characteristic " wing 

 on each side. The " blade," or the main leaf, is two 

 feet or more long, three inches broad in the widest 

 part, frayed out at the top, and thickened through 

 the whole length in the middle with a midrib, which 



apparently a continuation of the stem. This mid- 

 rib has not the definite outline which it has in the 

 Alaria, but is only a thickening of the middle of 

 the leaf which vanishes imperceptibly towards the 



ges and the top. The "wings" are stalked, not 

 crowded close together as in the Alaria, but set in 

 pairs, some distance apart, along the opposite sides 

 of the main Stem, four or five or more pairs of them, 

 from one to two feet long, and from one to one and 

 one-half inches broad, with no trace of a midrib. 

 Mr. Cleveland reports this plant common from February 



May, growing in deep water, along the coast as far 

 SOUth as San Die, Dr. Anderson finds it among 



