210 Cyclosporinje, Fucaceae, Ascoplnilum. 



Engi. & Prantl Natiiii. Pflanzenfani. 97, p. 281, OzotlialUa Decne et 

 Thur. [1845] Rech. Fuc. p. 131, Kuetz. Sp. p. 591, Fuci, Facodii, 

 Scytothalia', Chordarim, Ilalidrios sp. aiict. veter., Halicoccus 

 Aresch. [1846] Alg. Scand. exsicc. n. 51 & Phyc. scand. p. 254, 

 Physocaulon Kuetz. [1843] Phyc. gener. pag. 352. — Frons me- 

 diocris, disco radicali innata, compressa, linearis, ecostata, irregu- 

 hiriter dichotoma et hiteraliter ramosa; vesicuke in linea segmen- 

 torum mediana sita^ (rarius nulLne) ; scaphidia in ramulis (rece- 

 ptaculis) hiteralibus simplicibus distinctis, subinde cnespitose con- 

 gestis evohita, unisexualia, nonnum(|uam (in /1. constricto) herma- 

 phrodita; oogonia typice 4-spora, rarius 3- aut 5-spora, ceterum 

 ut in Fuco. 



Ohs. Differt a genere Fuco fronde ecostata et oogoniis 3-5-spo- 

 ris (nec 8-sporis). 



1. Ascophyllum nodosum (L.) Le Joh Liste Alg. Cherb. p. 96, Born. .jsi 

 et Tlmr. Et. phyc. tab. 18-20, Farl. Alg. of New EngL p. 99, Kjelhu. 

 Handb. I, p. 4, Ozothallia nodosa Decne in Ann. Sc. Nat. 1845, 

 p. 13, Kuetz. Sp. p. 591, KjeHm. Alg. of Arct. Sea p. 194, Fhy- 

 socaulon nodosum Kuetz. Phyc. gener. p. 852, Fucodium nodo- 

 suni J. Ag. Sp. I, p. 206, Fucus nodosus L. Sp. plant. II, p. 1628, 

 Turn. Hist. Fuc. tab. 91, Harv. Phyc. Brit. t. 158. Halidrys no- 

 dosa Lyngb. Hydrophyt. Dan. p. 37, t. 8, Halidrys nodosa, congesta 

 et gracilis De la PyL Terr. Neuv. p. 108 et seq., Halicoccus nodosus 

 Aresch. Alg. Scand. exsicc. n. 51, Phyc. scand. p. 254. — Frondc 

 compressa, repetite dichotoma aut decomposito-pinnata, pinnis li- 

 nearibus hic illic in vesiculas ex ovoideo ellipsoideas inflatis, re- 

 ceptacula subfasciculata piriformi-spha^rica longe pedicellata ge- 

 rentibus. 



Hal). in oceano Atlantico septentrionali a littoribus arcticis 

 Groenlandiie, Norvegiae et Foeroearum usque ad Hispaniam et Ame- 

 ricani; in mari Baltico; ad oras BrasiIi«(TiLESius). — Radix callum 

 magnum conicum sistens. Frondes aggregatae, 0,5-2 met. longie, 

 luteo-olivacere, exsiccatione nigrescentes, e tereti compress?e et 

 pinnatim distiche decompositae. Pinna' frondi conformes, basi exi- 

 mie attenuatcU, ita ut speciem articulationis fore rcferant. lineares, 

 6-7 millim. lata' et ubique a3(iualos, nisi quod hic illic in vesicu- 

 las ellipticas sint inlhitte. Pinmihe ultinue sinq)lices, a basi attc- 

 nuata cuneato-Iineares, e margine singulse aut plures fasciculatie, 

 alternse aut opposita:;, dcmum apice in receptacula inflata', facile 



