219 



var. foliosissima (Lamx.) J. Ag. 



J. Agardh, Spec. Sargassorum Austral., p. 108. 



Fucus foliosissimus Lamouroux, Essai Thalassiophytes (Ann. du Mu- 

 seum d'Hist. nat., vol. 20, 1813, p. 36, pi. 7, fig. 1). 



This form is different from the typical one by having nume- 

 rous, closely packed leaves which are smaller, proportionally 

 shorter, and more or less 

 undulate, frequently some- 

 what twisted. 



The receptiacles are shor- 

 ter and similar to the vesicles 

 hidden between the leaves. 



This species is very com- 

 mon along the shores of the 

 islands and occurs in exposed 

 or sheltered places. In ex- 

 posed localities, where the 

 sea constantly splashes the 

 rocks, Sargassum imlgare is 

 able to thrive above the or- 

 dinary water mark; in the 

 more sheltered places it occurs 

 close to it, or a little below. 



Sargassum imlgare is the 

 dominant species in the Sar- 

 gassum - vegetation forming 

 with Turhinaria trialata a 

 vegetation of large, brown 

 algse corresponding with the 

 Fucacese- vegetation in nor- 

 thern seas Fig- 169. Sargassum vulgare C. Ag. Part 



of a plant with receptacles and vesicles. 



A little over natural size, about 'Is 



magnified). 



Geogr. Distrib. This spe- 

 cies is said to occur at nearly all 

 subtropical and tropical shores of the Atlantic Ocean 

 West Indies, Africa, Spain etc. 



America and the 



2. Sargassum lendigerum (L.) Kiitz. 



KuTziNG, Species Algarum, p. 612; Tabulae Phycologicse, vol. XI„ 

 tab. 19, fig. II. J. Agardh, Species Sargassorum Austral., p. 110. F. Borgr- 

 SEN, 1. c. p. 4. 



Fucus lendigerus L., Species plant., p. 1628. Turner, Fuci, p. 107, tab. 48.. 



