Tin-: MARINE AlAi.K OV xNKW KNlJLAND. 103 



SARGASSUM, A^. 



(From snrgazo, the Spanish naiuo for tlio giilf-wtuMl) 



Fronds attached by a disk liavin^c hranchiiii; sttMus, Icavi's with a 

 midrib and distinctly stalked air-bhuhh'rs; triiit in special componnd 

 branches; eoncepticles hermaphrodite; spores single in the mother-cell. 



The most hi;;hly orjjj.-inizeil and l)y fiir tho lar;;ost «;oim3 of the Fucacea, of which at 

 least I'lO spoi'ios have ])oou tlescribetl. Thoy inhabit the wanner waters of the j;lol)e, 

 where they rt^plaeo tho Fuci. Anstralia, Japan, an<l tho adjacent coast of Asia aro 

 ]tartiouhirly rieh in speeies. We have one species whieli does not como north of Capo 

 Cod, bnt which is connnon southward. The «;»'nns has been subdivi«h'd by Kiit/in;;, 

 but even with his liaiitatioti tho species o^ Siirgassnm an; very numerous. 



S. YULGAKE, Ag. {Fucufi naia)h9, Tnrner's Hist. Fnc, PI. 4(1, non 

 Linn.— X. rulparc, Phyc. Brit., PI. 343.) 



Fronds two to live feet long, stem lilitbrm, smooth, irregnlarly 

 branching, leaves shortly petiolate, linear-lanceolate or oblong-lanceo- 

 late, one to three inches long, a qnarter to half an inch wide, sharply 

 serrate, midrib distinct, cryptostomata numerous on both sides of the 

 midrib; air-bladders spherical, quarter of an inch in diameter, stalked, 

 arising from a transformed leaf, the upper part of which often remains 

 as an appendage; stalks naked or slightly winged ; receptacles fdiforin, 

 branching cymosely, one to two inches long. 



Var. MoNTAGNEi. (*S'. Montcifjnei,, Bailey, in Ner. Am. Bor., Vol. f, 

 PI. 1 a.) 



Leaves narrowly linear, elongated, receptacles two to four inches long. 



Below low- water mark in warm, shallow bays from Cape Cod south- 

 ward. • 



In spite of its variations, with the exception of S. haccifcrum, which is sometiraes 

 washed Jishore, we have but one species of SarguHsum on our coast. As usually found, 

 it is more slender in all its parts than the typical S. vuhjare of the West Indies, but it 

 is occasionally found of the typical form. In var. Montafjnci, which is common, wo 

 have an extreme form, in which the fructifyin<^ branches are much elon.i;atc<l, but ono 

 sees all variations from short to long. 



S. BACCIFERUM, Ag. — CrHl/icccd. {Ft(cus uatdus, L.; Turner's Hist. 

 Fuc, PI. 47.— ,s'. haccifenm, Phyc. Brit., PI. 100.) 



Fronds six inches to a foot and a half long, stems filiform, smooth, 

 leaves linear-lanceolate, two to four inches long, midrib distinct, cryi)to- 

 stomata usually wanting; air-bladders stalked, spherical, tipped with a 

 filiform point ; receptacles short, cylindrical, forked. 



Washed ashore at Bath, L. L, Mr. A. R. Younff, an<l found lloating off 

 the coast near the (lull" Stream; West Indies, and lloating in tho 

 Atlantic. 



The common Ouir-u-.-c. I u'li.li /imu-s; attached iti tli" W.^st ludi.'-;. wli.-n- it fnufs. 



