80 University of California Puhlicatiwis in Botany r^^ou 8 



2. Plectonema Golenkinianum Goniont 



Rose colored or reddish yellow, forming an expanded layer on 

 rocks, or distribnted among other algae ; filaments intricate, elongated, 

 flexuons, repeatedly false branched; false branching in pairs, very 

 evident, smaller than the primary filaments, snbflagelliform, sheath 

 hyaline, somewhat thickened; trichomes rose colored, with short articu- 

 lations, torulose, 1.2-2/i, diam., articulations up to three times shorter ; 

 protoplasm homogeneous; apical cell rounded. 



Growing on rocks near high-tide limit. Golden Gate, San Fran- 

 cisco, California. 



Gomont, Sur quelq. Oscill. nouv., 1899, p. 35, pi. 1, fig. 11 ; Collins, 

 Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), no. 1713. 



The specimen distributed under no. 1713 of the Phycotheca Boreali- 

 Americana shows no trace of rose or rosy brown color, but the fila- 

 ments are more slender than those of P. BattersH as issued under 

 no. 1712 of the same distribution. No branching has been made out 

 with certainty but in other respects the plant resembles closely the 

 specimens under no. 603 of the Phycotheca Boreali- Americana, dupli- 

 cates of which were determined by Gomont. 



20. Symploca Kuetz. 



Filaments loosely attached at the base, forming prostrate or erect, 

 pointed, dense fascicles; trichomes single within a sheath, sparingly 

 false branched, straight at the apices, branches solitary; sheaths thin, 

 hyaline, firm or slightly mucous. 



Kuetzing, Phyc. Gen., 1843, p. 201, Phyc. germ., 1845, p. 167 

 (as '' Synploca," orthographic error) ; Sp. Alg., 1849a, p. 270 (cor- 

 rected to "Symploca"). 



The original spelling of the name of this species was " Synploca" 

 (cf. Kuetzing, 1843 and 1845, as noted above). This was undoubtedly 

 an orthographic error and was changed by Kuetzing himself to "Sym- 

 ploca" in 1849 {loc. cit.) Originally seven species were referred to 

 it, of which four still remain, two are doubtful, and one is now assigned 

 to Schizothrix {Sch. Friesii (Ag.) Gomont). The type may be con- 

 sidered to be Symploca miiralis Kuetz. There are twenty-six additional 

 species referred to the genus, at present, by far the greater number 

 being terrestrial or of fresh water. Certain species are distinctly and 

 exclusively marine. 



