VOL. 5] Notes on Alga. 121 



NOTES ON ALG^E. L 



WILLIAM ALBERT SETCHELL. 



The writer published in the late journal Erythea, three sets of 

 "Notes on Cyanophycese. " He now proposes to continue these 

 with the addition of material drawn from all groups, under the 

 above heading. He will attempt in this connection to give 

 occasional accounts of what is being done in the way of increas- 

 ing our knowledge of the Algae of the Pacific Coast, in particu- 

 lar, both in the way of discoveries and published accounts or 

 specimens. 



Laminaria ephemera Setchell mss. Plant vernal, apparently 

 disappearing in the early summer. Holdfast discoid or nearly 

 so, small. Stipe slender, 2 to 16 cm. in length, terete below, 

 sometimes slightly flattened above, without mucilage ducts. 

 Blade narrow, linear to linear-obovate in general outline, narrow- 

 ly cuneate at the base when young, but rounded and almost 

 cordate when older, split deeply longitudinally into from two to 

 several narrow divisions, and reaching a length of 60 cm., with- 

 out any sign of mucilage ducts. Sori covering the blade, in 

 more or less longitudinal lines (vittate in appearance in some 

 specimens), extending up from a solid basal portion, with 

 ordinary Laminarioid paraphyses and sporangia. 



Carmel Bay, Monterey County, California, Mrs. J. M. 

 Weeks!, C. P. Nott! ; April to June. 



HEDOPHYEEUM ge?i. nov. Laminacearmn Setchell mss. 

 Plants at first like Eaminariae of the digitate section, with holdfasts 

 and very short stipes soon becoming attached to the substratum 

 through hapteres given off from the decumbent, expanding, basal 

 margins, which in one species become decidedly thickened. 

 Blade at first simple, becoming more and more digitate as it in- 

 creases in diameter, at times more or less cucullate, but without 

 auricles at the bases of the segments. 



Hedophyllum sessile (Ag.) Setchell mss. Fronds ample, 

 bases not thickened, the blades becoming absolutely sessile 

 on the rocks, 30 to 50 cm. long, the surfaces either perfectly 

 smooth or with irregular bullate swellings scattered over them in 



