Eu-Floridete, Herposiphoniese, Streblocladia. 1063 



Streblocladia collabens (Ag.) Falkenb. Rhodomelaceen (1901) p. 348, 1735 

 t. 20, f. 1-8, Hatchinsia collabens Ag. Syst. p. 153, Sp. I', p. 82, 

 Polysiphonia collabens Kuetz. Sp. p. 822, J. Ag. Sp. II, 3, p. 1022, 

 Ardiss. Phyc. Medit. I, p. 385, Ifauck Meeresalgen p. 23, Polysi- 



phonia platyspira Kuetz. Sp. pag. 815 Tab. Phyc. XIII, t. 63, 

 f. a-c, Polysiphonia nodi/era Kuetz. Phyc. germ. pag. 320, Sp. 

 p. 824 (art. 8-siphoniis?), Tab. Phyc. XIII, t. 87, f. a-c (tetraspo- 

 rifera)?, Hatchinsia tenaissima Schousb. mscr., Ceramiam ma- 

 crocarpum, striatam, spicatum Schousb. niscr. (fide Falkenberg). 

 — Ceespite subgloboso, filis a basi articulatis deco.nposito-dicho- 

 tomis, nudiusculis aut inferne ramis lateralibus conformibus at 

 brevioribus subfastigiatis obsitis, superne longe protensis collaben- 

 tibus; articulis 5-6-siphoniis,ecorticatis, inferioribus diametro sequa- 

 libus, superioribus vix duplo longioribus; tetrasporangiis in apici- 

 bus ramorum distorto-flexuosis seriatis; cystocarpiis late ovatis, 

 ad ramos inferiores subpedicellatis. 



Hab. in oceano Atlantico ad Gades Hispaniae (Cabrera) ; ad 

 Tingin Africae (Schousboe) ; in mari Adriatico (Trnus, Kuetzlng, 

 Botteri, Hauck) ; in mari Tyrrheno ad « Livorno » (Caldesi), « Na- 

 poli » (Falkenberg), « Palermo » (Kny); ad « Cagliari » insuhe Sar- 

 dinioe (Piccone); in mari Jonico (Mazziari); ad ins. Guadelupam 

 (Duchassaing). — Caespes 4-10 cm. altus, globoso-expansus sub- 

 fastigiatus. Fila inferne seta porcina crassiora, firma, crebris di- 

 chotomiis decomposita, apice in tenuitatem capillarem reducta ibi- 

 que quam maxime mollia et fiexibilia, levissimo motuf aquoe ' flu- 

 ctuantia, lubrica, exsiccatione eximie collabentia, plana et niem- 

 branacea, madefacta in cylindraceam formam vix redeuntia. Rami 

 majores supra axillam patentes, suba3quales; nunc alter dichoto- 

 mise ramus brevior, quasi lateralis, ceterum similis. Inter dichoto- 

 mias proximas articuli 5-8 plerumque numerantur, nunc paucio- 

 res, nunc plures. Articuli ab ima basi distinguendi, siphonibus 

 circa centralem 5-0 nudis in sectione transversali conspicuis, in 

 tota planta breves, inferiores ob fila crassiora diametro oequales 

 aut immo breviores, superiores fere aeque longi at ob fila tenuiora 

 diametro fere sesquilongiores. Modo Polysiphonia? variegatm ge- 

 nicula inferiora obscura adparent in exsiccata, interstitiis lividis; 

 in superiore parte plantae protensa color in carneum tendit, ge- 

 niculis obscurioribus. Planta tetrasporangifera ramis lateralibus 

 brevioribus subfastigiato-dicliotomis obsita est; in ramulis horum 

 distorto-flexuosis tetrasporangia evolvuntur infra apiccs, plura, 



67 



