118 University of California Publications in Botany [Vol. 6 



Gloiophloea confusa sp. nov. 



Plate 14, figs. 4,4^-47. 



Scinaia furcellata Farlow, Eept. U. S. Fish Conim. for 1875, p. 699, 1876 (as to 

 Pacific Coast references only); 



C. L. Anderson, Zoe, vol. 2, p. 222, 1891; 



McClatchie, Proc. So. Calif. Acad., vol. 1, p. 356, 1897 (not Ulva furcellata 

 Turner). 



Scinaia furcellata var. undulata Farlow, Proc. Amer. Acad., vol. 10, p. 367, 1875, 

 Eept. U. S. Fish Comm. for 1875, p. 699, 1876; 

 Cleveland, Marine Algae of San Diego; 

 Setchell in Collins, Holden and Setchell, Phye. Bor.-Am., no. 422, 1898 



(Exsicc. !); 

 Collins, Marine Algae of Vancouver Island, p. 114, 1913 (not Ginannia 

 undulata Mont.). 



Plant dark red purple, 10-15 cm. high, 10-15 times dichotomous, 

 2 to 3 mm. in diameter (dried), branches of the same diameter 

 throughout, cylindrical, continuous; axils moderately broad; no axis 

 visible; dioecious ( !) ; antheridia forming a continuous coating over the 

 plant ; cystocarps numerous, scattered, obscure ; — axial strand stout, 

 of parallel longitudinal coarse filaments, slightly agglutinated together ; 

 outer cortex 40-60/x broad, of 5-6 layers of cells, the inner large and 

 rounded, becoming smaller toward the surface, the outermost slender 

 and elongated in short anticlinal rows ; utriclas at first forming a layer 

 later overtopped by the anticlinal filaments; corticating layer just 

 within the cortex, 105-120/x, broad, loose ; excurrent, oblique filaments 

 from strand to cortex, numerous, persistent, enclosed in a dilute jelly ; 

 dioecious; antheridia forming a close layer over the outer surface of 

 the antheridial plant, short, oblong; cystocarps broad pyriform, taper- 

 ing gradually to a carpostome, 250/^ (T) by 280-300/i (R) gonimo- 

 blasts numerous, slender, radiating from a distinct, few-celled 

 placenta, abjointing successively ellipsoidal spores; periderm of 5-6 

 flattened pseudoparenehymatous layers. 



As stated under Gloiophloea undulata and also indicated by the 

 synonymy quoted above, the plant of the western coast of North 

 America has been confused with Gloiophloea undulata. It is, however, 

 a dioecious .species, as careful study of the Californian material has 

 demonstrated, while Gloiophloea undulata has been sho^^^l, by a study 

 of the type specimen, to be monoecious. From Gloiophloea capensis, 

 the only other dioecious species known at present, it is to be dis- 

 tinguished by being more branched and by having a thinner cortex. It 

 has been collected in California at San Pedro by the writer, about 

 Monterey Bay by C. P. Nott and the writer, at Santa Cruz by Dr. 

 C. L. Anderson, near Half Moon Bay by Dr. Carl Skottsberg, Dr. N. 



