'.z*^- 'i:r-f:^AiJ' 



- ^^ ^-- ^.r_>-^ 



tfirfA 



Contribution. I 



87 



The typical form not seldom occnrs in rock-pools between 

 tides, bnthere it is always feebly developed. The plant ap - 

 pears in the inner part of deep bays as well as on open and 

 exposed coasts, but it thrives best in somewhat shelteredlo- 

 calities, almost ever gregarious. It attains a length of un- 

 til 3—4 m., but is mostly shorter. Specimens with young 

 zoosporangia have been tåken in the beginning of Angust. 

 Distribution: Pretty common along the whole coast, 

 entering the inner end of the deeper bays and at some pla- 

 ces abundant (f. typica); the form suhtomcntosa, according 

 to my experience, is scarce everywhere. 



Chorda tomentosa Lyngb. 



Hydr. Dan. p. 74. 



f. typica. 

 Beser, Cliorda tomentosa Åresch. Obs. Phyc. 3, p. 14. 



ri 



( 



r 

 ^. 

 1 



Fig. 



Exsicc. 



» 



M 



)> 



H 



Lyngb. 1. c. t. 19, fig. A. 



Ai^esch. Alg. Scand. exsicc. No. 93. 



f. subfulva nob. 



f. niinore, debiliorc, pilis subfulvis, siccata viridibus; zoosporangiis 

 subeDipticis vel oblongo-linearibus. 



The form that I have called f. subfulva I at first thonght 

 to be mostnearlyrelatedto 67^. aWjrma?^a, which Areschoug 



in his Obs. Phyb. 3, p. 15 states to have the habit of Ch. 

 tomentosa. And the spores and paranemata of the first spe- 

 cimens I found were like those of Gh. abhreviata. However, 

 by most of the other specimens, I later collected, the spores 

 and paranemata were in shape almost similar to those o£ 

 CA. tomentosa I typica. K j e 1 1 m a'n has had the kindness 

 to compare it with the original specimen of Ch. abbrcviata 

 Aresch., bnt this species is said to be more like a yonng 

 and slender Ch. fihim. The form subfulva is smaller and 



more slender than the typical form, 



attaining 



a length of 



about 1 m., thongh mostly only half the length or lesa. The 



ham are more tender and their cells shorter than by f, Uh 



