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Puget Sound Marine Sta. Pub. 



Vol. 1, No. 25 



KEY TO SPECIES 



A. Blade fan-shaped ; stipe not fimbriate, cylindrical below. 



1. A. cribrosum 



xVA. Blade oblong; stipe fimbriate, flattened. 



2. A. fimbriatum 



1. Agarum cribrosum Bory Diet. Class. 9: p. 192; {Agarum Gmelini 

 Mert., in Linnaea 4: p. 51.) Fig. 12 



Holdfast composed of several strong branching hapteres; stipe cylin- 

 drical, slightly flattened above, one to five cm. long, three to ten mm. wide ; 

 blade fan-shaped, wider than long, forty to sixty cm. wide, twenty to forty 

 cm. long; margin of blade ruffled and folded especially near the base; 

 perforations large, undulated, distributed regularly over the blade; mid- 

 rib broad, flat, one to two cm. wide. 



Agarum cribrosum 



PLATE 51 



Fig. 12. Sketch of typical plant. X 0.2. 



Without doubt the specimens here referred to Agarum cribrosum are 

 distinct from Agarum fimbriatum Harv. and belong to the Agarum cri- 

 brosum (Mert.) Bory mentioned by Setchell (15), p. 154, in which he 

 includes Agarum Turneri Post. & Rupr. (10), p. 12, pi. 22, and Agarum 

 Gmelini Mert., in Linnaea 4: p. 192. The specimens under consideration 



