Download PDF

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 promiscuously
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-
;