218 Unwersity of California Publications in Botany [Vol.8 



Kuetzing, Phyc. Gen., 1843, p. 268; Harvey, Phye. Brit., 1846, 

 pi. 86 ; Collins, Green Alg. N. A., 1909, p. 336. 



The typical form has not as yet been detected on our coast. It is 

 to be distinguished by its soft and gelatinous consistency and its seg- 

 ments which are long throughout the plant. 



Cladophora Rudolphiana f. eramosa Gardner 



Branches very long, subsimple. 



Growing in a warm salt water pond. Key Route Power House, 

 Oakland, California. 



Gardner, in Collins, Green Alg. Suppl. II, 1918, p. 81; Collins, 

 Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), no. 2241. 



A curious plant, seemingly nearest to Cladophora Rudolphiana, 

 has been found in flowing warm salt water. The branching is very 

 slight. The main filaments are 55/a to 60/a diameter and the ramuli 

 about 25/x diameter. The lower segments are from 4.5 to 6.5 diameters 

 long. 



^to- 



13. Cladophora Bertolonii var. hamosa (Kuetz.) Ardiss. 



Plants 3-10 cm. high, dark green; filaments rather stiff, 80-lOOju, 

 diam. in the main divisions, 25-30ja in the ramuli ; much branched, 

 main divisions di- trichotomous, opposite or whorled branches, usually 

 short and with densely set, secund, recurved ramuli, segments 1.3-3 

 diameters long, rarely more, terminal segments rounded, not tapering. 



Central California (Pacific Grove). 



Ardissone, Phyc. Med., 1886, part II, p. 242 ; Collins, Green Alg. 

 N. A., 1909, p. 344. Cladophora hamosa Kuetzing, Phyc. Gen., 1843, 

 p. 267, Tab. Phyc, 1854, vol. 4, pi. 8, f. 2. 



We know of this plant only from the report of Collins {loc. cit.), 

 who appends the following remarks: "Tlie California plant seems to 

 be more slender than the European, seldom exceeding 60/a in the main 

 branches and 25ju. in the ramuli. The dark color, short cylindrical 

 cells and elegant feathery tips, with a long series of secund, usually 

 slightly recurved ramuli on the similarly recurved branches, are fairly 

 clear characters." 



T4. Cladophora albida (Huds.) Kuetz. 



Plants soft, dense, pale green, filaments 20-30/a diam., segments 

 4-5 diameters long, delicate ; branching irregular, ramuli long, patent, 

 blunt. 



