1922] Gardner: The Genus Fucus on the Pacific Coast 31 



Fucus edentatus f. acutus f. nov. 

 Plate 25 



Frondes 9-15 cm. altae, disco comparative lato planoque oriundae, 

 dichotomae. angulis acutis, olivaceo-virides. siccatae atrae; segmentis 

 linearibus, 3-4 mm. latis, apicibus truncatis, costa valde prominente, 

 pereurrente. alis comparative angustis, persistentibus, cryptostomat- 

 ibus sparsis: receptaculis singulis aut valde bifurcatis, ad finibus qui- 

 busqne attenuatis, 2-2.5 cm. longis. 



Growing on sandstone in the middle littoral belt. Bellingham 

 (Fairhaven), Washington. 



Type, Gardner, no. 189 (Herb. Univ. Calif., no. 201137). 



Fucus in-flat us f. linearis Setehell and Gardner, Alg. N. "W. Amer., 

 1903. p. 280. 



The very dark color on drying, the absence of caecostomata, and 

 the sparseness of eryptostomata in this form seem amply sufficient to 

 ally it with the edentatus group rather than with the seemingly more 

 imperfectly defined group in flat us. The linear arrangement of the 

 eryptostomata in two rows along the prominent midrib and the rela- 

 tively small, pointed receptacles distinguish it from all other forms 

 of edentatus. 



Fucus edentatus f. divaricatus f. nov. 

 Platfi 26 



Frondes fragiles, plerumque 12-22 cm., rariore usque ad 32 cm. 

 altae, regulariter dichotomae, angulis latis, stipite et ramis infernis 

 fere teretis, saturate olivaceo-brunneae, receptaculis plerumque lutes- 

 centibus, segmentis anguste linearibus, latitudine ad furcas quasque 

 parvis diminuatis. terminalibus acutis, 2—5 mm. latis, costa usque ad 

 apices % 7 alde evoluta. alis fere deuntibus, cryptostomatibus paucis et 

 inaequaliter distributis ; receptaculis definite delimitatis, subulatis aut 

 leviter eomplanatis, 2.5—4.5 cm. longis, plerumque simplicibus aut 

 valde furcatis; conceptaculis eonspicuis. 



Growing on ledges of sandstone in the lower littoral belt. Belling- 

 ham. Washington, Comox and Ucluelet, Vancouver Island, British 

 Columbia. 



Type. Gardner, no. 2336a (Herb. Univ. Calif., no. 201198), Bell- 

 ingham, Washington, July, 1910. 



Fucus inflatus f. filiformis, Setehell and Gardner, Alg. N. W. Amer., 

 1903, p. 281 ; Collins, Mar. Alg. Vancouver Isl., 1913, p. 111. 



Since collecting this form at "Fairhaven," a town later incorpor- 

 ated with Bellingham, Washington, I have had an opportunity to 



