NO. 1 TAYLOR: PACIFIC MARINE ALGAE 249 



is little filamentous tissue in the pericarp and since the tetrasporangia are 

 unknown, it seems best to make a nominal assignment of this plant to the 

 genus Fauchea. 



HERPOPHYLLON Farlow, 1902 



Plants firmly fleshy, prostrate, subcircular to irregularly expanded, 

 attached by a stalk which is generally central ; internal structure paren- 

 chymatous, with thick cell walls, cortex of short anticlinal cell rows; 

 sporangia tetrapartite, associated with paraphj^sislike structures in verruci- 

 form sori. 



Herpophyllon coalescens Farlow 

 Plate 66, Figs. 2-6 



Plants commonly gregarious, the adjacent individuals concrescent; 

 thallus firmly fleshy, dull purplish red, nitent when dry, at first obconical 

 with a very small holdfast and short stalk tapering toward the base, later 

 more infundibuliform, reaching 10-15 mm tall, 10-25 mm diam. at the 

 flat to depressed top, which is circular to slightly irregular; later appear- 

 ing peltate, with a depressed center, though sometimes submarginally 

 attached, the disk of the thickened thallus parallel or even appressed to 

 the substratum, to 2-3 cm diam., the margin irregularly subangular and 

 the sides often emarginate; structurally with a massive colorless parenchy- 

 matous medulla, the cell walls near the outer part thick, those cells near 

 the center to 150 /x diam., the outer ones smaller; cortex of two or three 

 cell layers in branching subfilamentous anticlinal series, the inner larger 

 and roundish, the outermost oval to subcylindrical, 4-8 /a diam., 12-18 /* 

 tall, closely placed with thin lateral walls and a slightly thickened outer 

 membrane, forming a definite surface layer; tetrasporangia formed in 

 thickened cortical areas of looser construction, the sporangium replacing 

 a branch of one of the cortical cell rows, the neighboring branch simu- 

 lating a paraphysis. 



Farlow 1902, p. 97. 



This material was compared with the type specimens from the her- 

 barium of Stanford University, and its identity is certain. Farlow de- 

 scribed the tetrasporangia as cruciate, 56 /i long, 15-20 fi diam., and indi- 

 cates that the sori may become verruciform. In the present material the 

 sporangia were immature. 



Ecuador: Archipielago de Colon, in crevices and on rock faces at 

 about high tide line, near Black Beach Anchorage, I. Santa Maria, no. 

 34-265, 18 Jan. 1934. 



