660 University of California Publications in Botany [Vol. 8 



1801 (Draparnaud, Discours sur les moeurs des plantes, fide Steudel) 

 and was apparently applied to a Discomycete. Roussel also used 

 the name for a fungus in 1806 (fide Steudel). C. A. Agardh (1817, 

 p. xx ) first used the name for a genus of algae of far wider extent 

 than that in which it is used at present. J. G. Agardh has variously 

 applied the name, his final and rather too narrow limitation having 

 been published in 1894. 



Zonaria Farlowii 8. and G. 



Plate 34, fig. 5; plate 36, fig. 20; plate 43, fig. 63, and plate 97 



Fronds 8-12 cm. long, profusely and more or less flabellately 

 branched, terminal lobes flabellate, alae at times split into numerous, 

 narrow and pointed segments, lower part forming a much thickened 

 stipe, becoming decidedly stupose ; marginal growing cells very large, 

 densely filled with cell contents; medulla composed of 6-9 layers of 

 cells parallelopiped in shape, having scattered chromatophores ; aplano- 

 spores borne in sori, irregular in shape and size, scattered promiscu- 

 ously on both sides of the frond, formed under the cuticle among 

 numerous, multicellular paraphyses, growth of aplanospores and para- 

 physes finally rupturing the cuticle allowing the escape of the spores ; 

 paraphyses clavate, composed of 5-7 cells ; hairs borne in small, inde- 

 pendent groups or arranged in transverse bands. 



Growing on rocks in the upper sublittoral belt, and in pools in the 

 lower littoral belt. Southern California (Santa Barbara to San 

 Diego). 



Setchell and Gardner, Phyc. Cont., VII, 1924, p. 11. Zonaria 

 Toiirnefortii Farlow, in Farlow, Anderson and Eaton, Alg. Exsicc. 

 Amer.-Bor., 1878, no. 91; Collins, Holden and Setchell, Phyc. Bor.- 

 Amer. (Exsicc), no. 86; Tilden, Amer. Alg. (Exsicc), no. 336 (not 

 Fucus T&urnefortii Lamouroux). Zonaria flava Harvey, Ner. Bor.- 

 Amer., part 3, Suppl., 1858, p. 123 (not Fucus flavus Clem.). 



The Zonaria abundant on the southern coast of California is near 

 to Z. Towmefortii (Lamour.) Farlow (i.e., Fucus Toumcfortii 

 Lamour.) or Z. flava (Clem.) Agardh of Europe, but that is a coarser 

 plant than ours with larger cells, and (judging from Kuetzing's figures, 

 1859, pi. 65, I, fig. b) the sori lack paraphyses as do those of Z. Turner- 

 iana J. Agardh of Australia (fide specim. auth.). It is a more slender 

 species than Z. zonalis (Lamour.) Howe (Stypopodium lobatum (Ag.) 

 Kuetzing). Z. Sinclairii (Harv.) J. Agardh is narrow and of Homoeo- 



