Myxophyceae, Heterocystideae, Nostoc. 401 



germ. p. 170. Sp. Alg. p. 299, Tab. Phyc. II, p. 3, t. 7, f. III, Rab. 

 Fl. Eur. Alg. II, p. 176, Born. et Thiir. Not. Alg. II, p. 9.""), Nostoc 

 sudeUcum Kuetz. Dhign. und Bemerk. in Bot. Zeit. V, pag. 219, 

 Sp. Alg. p. 299, Tab. Phyc. 11, p. 3, t. 7, f. 11, Kab. Krypt. v.' 

 Sachs. p. 97, FI. Eur. Alg. II, pag. 17(5, Kirclin. Algenfi. von 

 Schles. n. 231, Ho7^mosiphon riparmm. Malinverni iii Erb. critt. 

 it. ser. I, n. 533 ! iVbs/oc r^p«rmm Rab. FI. Eur. Alg. 11, p. 170, 

 Kern. Fl. exs. Austr. Hung. n. 399! — • Thallo geI;itinoso-niem- 

 branaceo, irregulariter expanso, pagina inferiori adnato, tubercu- 

 loso, sonlide olivaceo vel fusco; filis flexuosis , dense intricatis; 

 trichoniatibus 3-4 [i. crassis, confonnibus, olivaceis; articulis sphie- 

 rico-doliiformibus vel cylindraceis, diam. subduplo longioribus; he- 

 terocystis subglobosis, 6-7 [x. latis; sporis oblongis, catenatim se- 

 riatis, numerosis, 8-12 «= 4-8, episporio levi lutescente. 



Hdb. ad muscos et terram udam per Italiam (Meneghini, Ce- 

 SATi, Zanfrognini, FoRTi), Belgium (Flahault), Galliam (Bornet, 

 Flahault, Belloc, Gomont, Brebisson, Gaspary), Angliam (Has- 

 SALL, CooKE, West), Corsicam (Leveillej, Alsatiam (Giorgino), 

 Sabaudiam (Theobald), Silesiam (Kirchner), Saxoniam (Rabbn- 

 horst) et passim per totam Germaniam (Kuetzing, Reinsch etc), 

 Boiiemiam (Hansgirg), Riesengebirge (Schroeder), Fenniam (El- 

 pving), Galiciam (Gutv^inski), Austriam (Heufler, Stockmayer, 

 IIansgirg, MuiiL), Istriam (Hansgirg), Dalmatiam, Bosniam, Mon- 

 tenigrum (Schmidlb, Protic), Tyroliam (Unger, Hansgirg, Kerner, 

 Dalla Torre et Sarnthein), Hungariam (Filarszky), Islandiam 

 (G. S. West), Americam borealem (Wolle, Farlow, Setchbll et 

 Gardnbr, Collins, Setchell et Lawson, Bbssey), .Equatoriam 

 (Lagerheim), Brasiliam ad « Tuberao » (Von Martens), Africam tro- 

 picam (Welwitsch), ins. S. Vincenti (West). — Var. tenax Thuret in 

 Born. et Thur. Not. Alg. II, p. 99, Born. et Flah. Rev. IV, p. 205: 

 thallo firmiore, filis tenuioribus et sporis minoribus. Ad parietes 

 cryptarum prope Biarritz et NiCceam maritimam GallicB (Bornet et 

 Thuret), « Covvside Beck, Arncliff"e » Angliae (West). 

 21. Nostoc paradoxum Welw. in W. et G. S. West Welw. Freshw. 

 Afr. Algie in Journ. of Botany 1897, p. 268. — Thallis vix 1,5 mm. 

 latis, gregariis vel solitariis, olivaceo-viridibus et nigrescentibus, 

 peridermide tenui et hyalina; filamentis densissime intricatis, fie- 

 xuosis et abrupte contortis; trichomatibus uniformibus, 3,5-3,8 (x. 

 diam., leruginosis; articulis cylindricis, quadratis v. diamctro 1 '/j- 



26 



