716 University of California Publications in Botani/ [Vol. 8 



8. Sargassum Liebmanni J. Ag. 



Plate 45, fig. 81 



Fronds about 30 cm. high, arising from a parenchymatous disk, 

 stipe terete, very short ; primary branches filiform, slender, smooth ; 

 leaves lanceolate, acuminate, costate, cryptostomata absent, margins 

 undulate, spinulose-dentate; vesicles spherical, submarginate, apicu- 

 late, sparse, on pedicels shorter than their diameter, smooth ; recep- 

 tacles densely aggregated into a racemose cyme, more or less twisted, 

 triangular, with each angle bearing a row of spinescent teeth. 



West coast of Mexico. 



J. Agardh, Nya Alg., 1847, p. 8, Sp. Sargass. Aust., 1889, p. 91, 

 pi. 5 ; Grunow, Ad. cog. Sargass., 1915, p. 398. 



The exact locality whence the type material of this species was 

 obtained by Liebmann is not known. Agardh states ' ' Pa mexicanska 

 stranden af Stillen Oceanen. " Possibly the locality is St. Augustin. It 

 apparently has not been seen since the original discovery was made. 



9. Sargassum Agardhianum Farlow 



Plate 39, fig. 46; plate 41, fig. 55, and plate 92 



Plants anchored by a firm, expanded, warty, parenchymatous hold- 

 fast ; perennial ; fronds 25-35 cm. high, rarely up to 9 dm. high, terete, 

 slender, simple at first but later branching a few millimeters above the 

 base; branches few to many, filiform, terete or slightly angled, much 

 surpassing the main frond or stipe which remains comparatively short ; 

 as the lower branches fruit and disintegrate, new ones arising from the 

 transition region above; the fronds and branches giving rise either to 

 leaf-like segments alternately arranged, linear-lanceolate, with sharply 

 toothed margins and apex, and with a midrib and scattered crypto- 

 stomata, or to filiform segments beset with sharp teeth ; in the axils of 

 the segments either short branches bearing clusters of small vesicles, 

 2-6 in number, or longer secondary branches bearing leaf -like seg- 

 ments and vesicles in turn ; vesicles on pedicels 1-1.5 mm. long, 

 spherical or slightly ellipsoidal, smooth or in part slightly margined 

 and toothed, with few cryptostomata, apiculate, 1.5-2.5 mm. diam. ; 

 receptacles in small clusters in the axils of certain segments, simple or 

 bearing few sharp tooth-like projections; conceptacles conspicuous. 



Growing in the lower littoral and upper sublittoral belts. Southern 

 California and Lower California (Ensenada). 



