19-2] 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 oriiindae, 

 dichotomae, an^ilis acutis. olivaceo-virides, siccatae atrae ; segmentis 

 linearibus, 3-4 mm. latis, apieibns trimeatis, costa valde prominente, 

 percurrente, alis comparative angustis, persistentibus, cryptostomat- 

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

 bn.sque 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 Setchell and Gardner. Alg. N. W. Amer., 

 1903, p. 280. 



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

 the sparseness of cryptostomata in this form seem amply sufficient to 

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

 imperfectly defined group infiatus. The linear arrangement of the 

 cryptostomata 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. 



Plate 26 



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

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

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

 centibus, segmentis angaiste linearibus, latitudine ad f ureas quasque 

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

 apices valde evoluta, alis fere deuntibus, cryptostomatibus paucis et 

 inaecpialiter distributis; receptaculis definite delimitatis, subulatis aut 

 leviter complanatis, 2.5-4.5 cm. longis, plerumque simplicibus aut 

 valde furcatis; conceptaculis conspicuis. 



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 in flat us f . filiformis, Setchell 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 



