580 University of California Publications in Botany [Vol.8 



Collins, Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), Fasc. A, 

 no. 1; Tilden, Amer. Alg. (Exsicc.) no. 354. 



Adenocystis (Lessonii var. ?) calif ornica Ruprecht, Tange Och., 

 1851, p. 291. Coilodesme amplissima, Setchell, Algae novae I, 1912, 

 p. 232. 



The question as to the identity of the Adenocystis (Lessonii var.?) 

 calif ornica of Ruprecht (loc. cit.) rests upon an imperfect description 

 on the part of Ruprecht. The more definite statements of Kjellman 

 and his illustrations seem to indicate that the plant intended was, at 

 least, not ample, but in fact short and with a comparatively long 

 slender stipe, dark brown, and an epiphyte. This was the inference 

 of Setchell (1912, pp. 231, 232) although the herbarium specimens 

 selected under that impression did not thoroughly correspond. Yendo 

 (1913, pp. 279, 280) has stated that Kjellman 's Bering Island plant 

 (loc, cit.) does not agree with Ruprecht 's type, which does agree with 

 Tilden 's plant (no. 354, American Algae) from Vancouver Island 

 which Setchell (lac. cit.) had referred to his Coilodesme amplissima. 

 Yendo makes no statements as to characters or differences and his 

 opinion is so little in agreement with the figures quoted by Ruprecht 

 (viz., i>i Voy. Coquille, Bot. Atlas, 1826, pi. 11, fig. 2) that we hesitate 

 to prefer his judgment to that of Kjellman. The important character 

 separating the Coilodesme calif ornica of Kjellman and the C. amplis- 

 sima of Setchell is the stipe, comparatively long and slender in Kjell- 

 man 's plant and practically wanting in Setchell 's species. Ruprecht 's 

 plant, however, was epiphytic on Cystoseira osmundacea, as is C. 

 amplissima, while Kjellman 's plant is said to be epiphytic on larger 

 algae. C. amplissima is widespread along the coast from Yakutat Bay, 

 Alaska, to San Pedro, California. From the maze of uncertainty, it 

 seems best to adopt Yendo 's statement as to the identity of Ruprecht 's 

 plant and to regard C. amplissima as a synonym under C. calif ornica. 



Coilodesme calif ornica, as identified by Yendo, is an ample saccate 

 species, the largest of the genus, with delicate walls, usually light 

 yellowish brown in color, with extremely short stipe and parasitic on 

 Cystoseira osmundacea and Cystophyllum geminatum. It extends 

 from the Puget Sound region and possibly even from Yakutat Bay, 

 Alaska (Saunders, 1898, p. 422), although the more northern refer- 

 ences are subject to suspicion as to possible confusion with our C. 

 sitchensis. Its southern limit is at San Pedro, California, so far as 

 shown by available specimens. It is the only species as yet detected on 

 the coasts of central and northern California where is situated Fort 

 Ross, the designated type locality of the species. 



