NO. 1 TAYLOR : PACIFIC MARINE ALGAE 253 



Ecuador: Archipielago de Colon, occasional on surf-beaten rocks 

 south of Black Beach Anchorage, I. Santa Maria, no. 34-223 (tetraspo- 

 rangial), 17 Jan. 1934, and 34-393, 30 Jan. 1934. 



DENDRYMENIA Skottsberg, 1923 



Dendrymenia flabellifolia (Bory) Skottsberg 



Plate 85 



Plants clustered, the fibrous base somewhat flagelliferous, the axes 

 simple or branched, to 35 cm tall, ultimately denuded below, developing 

 dull reddish purple membranous subsessile blades, these on immature axes 

 distichous, oblanceolate, on older plants the blades in pyramidal spiral 

 succession from the apex, 1-6 times irregularly dichotomously forked, to 

 6 cm long, the segments to 2-4 mm wide above the dichotomies, the apices 

 rounded to spatulate ; tetrasporangia in sori at the branchlet tips, the sori 

 with a narrow sterile margin. 



Farlow 1902, p. 99; Howe 1914, p. 124, pi. 49 (both as Rhodymenia 

 flabellifolia) ; Skottsberg 1923, p. 16, figs. 3d, 3e. 



There is a good deal of difference in luxuriance between these two 

 groups of collections ; those from Black Beach are much like Howe's illus- 

 trations, but those from Pt. Christopher are more luxuriant, the axes less 

 branched, more pyramidal, and with much longer blades. It is from the 

 latter that the description is chiefly drawn. Farlow 's (loc. cit.) R. flabelli- 

 folia from Elizabeth Bay is probably a very attenuate phase of this plant 

 with the blades widely spaced on a slender stem, but his specimens from 

 Iguana Cove and Tagus Cove, likewise on I. Isabela, are compact and 

 bushy. On examination of his specimen at the Farlow Herbarium it was 

 evident that the succeeding sections of axis and blade arose either from 

 the face of the blade near its base or from the lower margin, or from the 

 axis below the blade; there was no "amplexicaul" decurrent margin from 

 the blade above. 



Ecuador: Archipielago de Colon, a fragment floating off Pt. Chris- 

 topher, I. Isabela, no. 34-197, 16 Jan. 1934. Ibid., attached to rocks in the 

 surf zone at the point, abundant and very well developed, no. 34-204, 16 

 Jan. 1934. Ibid., on surf-beaten intertidal rocks south of Black Beach 

 Anchorage, I. Santa Maria, no. 34-400 (tetrasporic), 30 Jan. 1934. 



BOTRYOCLADIA Kylin, 1931 

 Plants with a terete, wiry, generally branching stem which bears oval 

 to spherical hollow vesicular branchlets ; vesicles with large more or less 

 colorless inner cortical cells inside, associated with gland cells facing the 

 cavity, and smaller cortical cells outside ; tetrapartite sporangia or cysto- 

 carps scattered at the surface of the vesicles. 



