19 --] Gardner: The Genus Fucus on the Pacific Coast 19 



Fucus furcatus f. linearis f. nov. 

 Plate 5 



Frons paullo eaulescens, eartilaginosa, 30-35 cm. alta, ramosissima 

 diehotoma, obscure olivaceo-viridis, siccata atra ; segmentis strictis, 

 linearibus. 8-12 mm. latis, caecostomatibus 40-70 in quoquo cm. 

 quadrate siceatis inconspicuis ; receptaculis numerosissimis distincte 

 definitis, quam frondibus latioribus, integris vel bifidis, vulgo ovatis, 

 1.5-2 cm. longis; conceptaculis numerosis, amplis. 



Growing in quiet water on boulders in tbe lower littoral belt. 

 Tracyton, Kitsap County, "Washington. 



Type, Gardner, no. 2206& (Herb. Univ. Calif., no. 201142), May, 

 1910. 



This form is remarkable for the abundance of receptacles it produces 

 on a single plant. Plate 5 was made from a portion of a plant that 

 had approximately five hundred and fifty receptacles. It is also rather 

 unusual that so many of the segments should fruit at the same time 

 as is the case in this form. Not a single segment remained sterile in the 

 above mentioned plant. This form does not seem to be abundant in 

 the Puget Sound region. 



Fucus furcatus f. abbreviatus f . nov. 

 Plate 6 



Frondes cartilaginosae rigidae, asperae, 8—12 cm. altae, regulariter 

 dichotomae, olivaceo-virides vel olivaceo-brunneae vel luteolae ; seg- 

 mentis cuneatis vel linearibus, 8-16 mm. latis, apicibus truncatis, costa 

 angusta evidente, caecostomatibus comparative amplis, siceatis prom- 

 inentis. 60-80 in quoquo cm. quadrato ; receptaculis distincte definitis 

 quam segmentis multo latioribus, 2-2.5 cm. longis, complanatis vel muco 

 inflatis, 1-2-furcatis, apicibus acuminatis; conceptaculis numerosis 

 valde prominentibus. 



Growing on boulders in the middle littoral belt. Islands of San 

 Juan County and vicinity, Washington. 



Type, Gardner no. 2347 (Herb. Univ. Calif., no. 201200), Waldron 

 Island. San Juan County, "Washington, July, 1910. 



This form is fairly abundant in the moderately quiet waters among 

 the islands of San Juan County, "Washington, and extends into the 

 upper Sound region. It varies considerably in size, both in length 

 and in width of the fronds. Specimens 3 to 4 cm. in height have been 

 taken in full fruit, but these were depauperate forms, in the upper 



