3i2 



Puget Sound Marine Sta. Piib. 



Vol. 1, No. 29 



en such a thing as the violence of a recent storm and not on the absence 

 of the plant on account of a seasonal change. 



Collections were made at Lincoln Beach and Fort Lawton, both in 

 Seattle, and at a few other points on Puget Sound. The time extended 

 from November, 1916, to April, 1917. The temperature of the water 

 varies from 5° to 6° C. in winter to about 15° C. in the summer. It was 

 desired to determine what species thrive here in the winter months, whether 

 or not thej^ reproduce all winter, and whether, in the case of the reds, 

 there is a predominance of sexual or of asexual plants. The presence 

 or absence of young plants, indicating the amount of germination of spores 

 in winter was also noted. An increase in the number of young plants with 

 the arrival of spring was specially looked for since it would indicate an 

 effect of warmer weather or increased light intensity in producing period- 

 icity corresponding to that of land plants. 



Table 1. Winter conditions of the Rhodophyceae. 





^< 





S.3 

 01 tl? 



Agardhiella tenera (J. Ag.) Schmitz 



*Antithamnion floccosum paciflcum (Harv. ) S. & G 



Callophyllis variegata (Bory) Kuetz 



Callithamnion sp 



Centroceros sp 



Ceramium californicum J. Ag 



Ceramium rubrum (Hud. ) Ag 



Ceramium strictum ( ?) Harv 



Constantinea sitchensis P. & R 



Cryptosiphonia woodil (Harv.) Palk 



*Dasyopsis plumosa (H. & B.) Schmitz 



Farlowia mollis (H. & B.) F. & S 



Fauchea gardneri Setch 



Gigartina mamillosa (G. & W.) J. Ag 



Gigartina radula exasperata (H. & B.) Setch 



Gracilaria confervoides (L. ) Grev 



Iridaea laminarioides Bory 



Laurencia pinnatifida (Gmel.) Lam 



Microcladia californiea Farlow 



Nitophyllum latissimum (Harv.) J. Ag 



Nitophyllum ruprechtianum J. Ag 



*Odonthalia aleutica (Ag.) J. Ag 



Platythamnion heteromorphum typicum S. & G. . . . 



Plocamium coccineum (Hud.) Lyng 



*Polyslphonia californiea Harv 



Polysiphonia urceolata (Litf.) Grev 



Porphyra perforata J. Ag 



Prionitis lyallii Harv 



Pterosiphonia baileyi (?) 



Pterosiphonia dendroidea (Mont.) Falk 



*Rhodomela larix (T'arn.) Ag 



Pthodomela lycopodioides (L.) Ag 



Rhodymenia palmata (L. ) Grev 



Rhodymenia pertusa (P. & R.) J. Ag 



Sarcophyllis californiea J. Ag 



*Antheridial plants found. 



