A Monograph of the Geniis Alaria. 117 



smooth, coQiplanated, elevated above the blade equally on both 

 surfaces with angulate edges, continuous to the stipe below. 

 Sporophylls metasoric, 8-15 in number, pinnately arranged on both 

 margins of the complanated part of the stipe, a few lowermost 

 ones distant, but middle and upper ones disposed at short regular 

 intervals, adding new ones successively upwards, linear-lanceolate, 

 15-50 cm. in length, 3-6 cm. in breadth, with a well-defined, short, 

 terete petiole, margin undulate ; base acute ; apex varying from 

 acute to roundish. Sorus in a continuous patch on both surfaces 

 of each sporophyll occupying nearly the whole area of surface of 

 sporophyll except a narrow border along the margin and often a 

 small portion of the tip. 



Remarks on the synonyms. This species was first described by 

 Setchell under joint authorship with Kjellman in the paper cited 

 above. He reserved the identity of the species with A. marginata 

 as a question. Afterwards, in Critical Notes, 1. c, he stated that 

 his examination on the typo of A. grandlfolia J. Ag. in the Agardh- 

 ian Herbarium convinced him of the identity of A. grandifolia 

 and A. valida. The specimen distributed as Phyc. Bor.-Amer., 

 No. CV, under A. grandifolia J. Ag. by Collins, Holden and 

 Setchell seems to have been placed by following this view. It 

 agrees well with the description given in Algae N. W. Amer., p. 

 278. Although it is noted on the label of the exsiccata : " The 

 plant here distributed are of longer form agreeing well with J. 

 Agardh's description and type specimen," the specimen in the 

 copy I have seen shows a marked difference from any of the type 

 specimens of A. grandifolia J. Ag. The type specimens are dis- 

 tinguished by J. Agaedh into three formée, junior, intermedia and 

 adidta. They are equally provided with long, narrowly cuneate 

 sporophylls. The stipe is very stout, the largest one measuring 



