2^8 Myxophycese, Lyngbyeaj, Lyngbya. 



minor Crouan 1. c. p. 31, Ed. II, p. 28, Lyngbya bicolor Crouan 

 m M. et S. Ess. de class. der Alg. de la Guadel., II ed., p. 30, 

 Lyngbya torta Crouan in M. et S. Ess. de class. alg. Guad. II ed. 

 p. 30, Lyngbya riifescens Crouan 1. c. p. 31, Lyngbya fusca Crouan 

 \. c. II ed. p. 30, Lyngbya fontana Crouan 1. c. p. 30, Lyngbya 

 fontana f. crassior Crouan 1. c p. 31. — Ciespitibus extensis, 

 elongatis, penicillatis, obscure ?erugineis, siccitate interdum nigro- 

 violaceis, ad dm. et ultra longis; filis valde elongatis, ad basim 

 plus minusve flexuosis et intricatis, superne rectis, parallelis, ri- 

 gidis; vaginis hyalinis, tenuibus, papyraceis, chloroz. jodur. CcTeru- 

 lescentibus; trichomatibus Cceruleo-aerugineis, ad genicula eximie 

 constrictis, apice haud attenuatis, 7,5-13 [x. crassis; articulis inie- 

 qualibus, quadratis aut diam. fere 3-plo brevioribus, 3-10 [jl. longis, 

 contentu granuloso farctis; dissepimentis passim granulatis; cellula 

 apicali rotundata, calyptra nulla. 



Hab. limo saxisve adfixa in aqua dulci, nec non thermali re- 

 gionis intertropicalis, ad puteos, piscinas rivulosque insuIiB Ceylonae 

 (Ferguson), Antillarum (Maze et Schramm), Jamaicae (Collins), 

 Guyanie ad Cayennam (Leprieur) «Montealegre» Amer. mer. (Di- 

 ckie), Brasiliie (Schmidle), ins. Reunion (Jadin). — CI. West hanc 

 formam invenit etiani in Anglia meridionali. 



30. Lyngbya Kuetzingiana Kirchn. Alg. Schles. p. 242, Hansg. Prodr, II, 

 p. 102, Phormidiuni obscurum Kuetz. Phyc. germ. p. 162, 1845, Sp, 

 p. 251, Tab. Phyc. I, p. 32, t. 45, f. IV, non Rab. Fl. Eur. Alg. II, 

 p. 118. — Strato compacto stratoso, saturate ;ierugineo viridi vel 

 olivaceo-fuscescenti; stratibus inferioribus sordide albidis; tricho- 

 matibus flexuoso-curvulis, ferugineis, 3,5-4 [i. crassis, articulis circ. 

 diam. sequalibus ; dissepimentis granulatis, geniculis apicalibus 

 parum contractis; cellula apicali obtusa recta. 



Hab. in humidis locis Germania? (Kuetzing, Rabenhorst), 

 Austrife in tecto prope «Miihllacken» (Heufler), Bohemire (Hans- 

 girg), Tyrolise (Hansgirg, Dalla Torre, Sarntheini, Galicicne 

 (GuTwiNSKij, Istri^ie, Dalmatijie (Hansgirg). — Var. symplociformis 

 Hansg, Prodr, II, p. 102, Phormidium obscurum var. symploci- 

 forme Dalla Torre et Sarnt. Alg, v, Tyr, Vorarl. u. Liechtenst. 

 p. 146, Symphyothrix radians Kuetz. Tab. Phyc. II, p. 57 p. p. 

 (syn. dubium): filamentis plerumque vaginis ;,egrius conspicuis, 

 facile diffluentibus pra^ditis, rarius nudis, rectis vel leviter curvatis, 

 fasciculis 2-4 mm. longis, erectis, aculeiformibus vel penicilli- 

 formibus. Passim in Bohemia et Tyrolia (Hansgirg). 



