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Vol. 26 



No. 1 



BULLETIN 



OF THE 



TORREY BOTANICAL CLUB 



JANUARY 1899 



Four siphoneous Algae of the Pacific Coast 



By De Alton Saunders 



(Plate 350.) 



CoDiuM MUCRONATUM Californicum J. Ag. Till Algerti. System. 



VIIL, 44. 



The plant forms rather dense tufts of indefinite extent which 

 are very firmly attached to the rocks by numerous, creeping, rhi- 

 zoidal filaments. The plant body is erect, dichotomously divided, 

 1.5-3 *^^- ^igh, .5-1 cm, in diameter, of a spongy consistency, 

 composed of a central mass of irregularly branching filaments 

 from which arises a compact mass of unbranched peripheral fila- 

 ments ; the young peripheral filaments are cylindrical, ending in 

 an acute mucron ; as the filaments mature they become clavate 

 and the mucron shorter and more obtuse. Figs, i, b and c. 



The sporangia arise from near the base of the peripfieral fila- 

 ments, are sessile or subsessile, cylindrical or oval, I 50-300 /i long 



and 60-120// broad. 



This plant has been repeatedly collected on the Pacific coast 

 and almost uniformly referred to Codiiun tovientositm * (Huds.) 

 Stack. The peripheral filaments of the latter species are obtuse 

 or rounded at the end, not at all mucronate and the cell wall is 

 only slightly thickened.! (Fig. i d.) Moreover the sporangia of 



Harvey, Ner. Bor., 2:28, Pacific coast localities only. Harvey, Not. Coll. 

 Alg. made on N. W. coast, 161. Anderson, "List, etc. 



I Fig. I, d^ was drawn from No. 168 of Phyc. Bor. Am. specimen from tlie coast 



amaica 



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[Issued January 16.] 



