458 Myxophyceae, Heterocystidese, Anabsena. 



matibus nudis, angaiformibus, in glomerulos minitPxOs, fBi*ugineos, 

 endophyticos aggregatis; sporis ignotis. 



Hab. in lacunis intercellularibus frondis AzoIIjo Caroliniana3 

 endophytica passim cuin filice in (jrermania (Strasburger); ad 

 Lund in Suecia (Nordstedt); in Dania in aquariis horti botanici 

 Hafniensis (Nordstedt) et Italia in aquariis horti botanici patavini 

 (FiORi, FoRTi) et romani (Martel); in America boreali National 

 Park (Tilden). 



40. Anabaena reniformis Lemmerm. Beitr. zur Kenntn. d. Planlvto- 

 nalg. II (in Bot. Centralbl. 1898, n. 44-45) pag. 7. — Trichomati- 

 bus solitariis, libere natantibus, in spiralem 16-17 \h. latam, den- 

 sam convolutis; cellulis reniformibus, breviter incurvatis, vacuolis 

 pmeditis, 4 [x. diam., 7-8 {i. longis;^ heterocystis globosis, utroque 

 polo compressis; sporis ignotis. 



Hab. in «Steinhuder Meer» Germanite borealis, limnetica (Lem- 

 mermann). 



41. Anabsena luteola Schmidle in Simmers IV Bericht ueb. die Kry- 

 ptogamenfl. der Kreuzeckg. in Allg. bot. Zeitschr. 1901, pag. 3, 

 c. ic. — Trichomatibus in fragmentis ligneis submersis vegetan- 

 tibus in flocculos microscopicos consociatis aut solitariis juventute 

 vagina tenui, hyalina circumfusis, deinde nudis; trichomatibus 7-8 

 (j.. diam., articulis ellipticis, semper longitudine latioribus, apice 



■ valde attenuatis, fere acuminatis, contentu luteolo, leviter granu- 

 lato; heterocystis late ellipticis, s;^pissime hyalinis. 



Hah. in valle « Berger » CarinthiDe (Simmer). — Inter binas 

 heterocystas siepe trichomata secundum axem sunt divisa et se- 

 ries cellularum du;ie videntur. Divisio longitudinalls forsan evolu- 

 tione centrifuga oritur. An potius gen. novum? 



42. Anabaena? truncicola Borzi Not. Morfol. ficocrom. in N. Giorn. 

 Bot. It. 1878, vol. X, pag. 286 (sub Sphcerozyga). — Trichoma- 

 tibus, muco matricali citissime evanescente, subsolitariis aut paucis 

 in stratum indefinitum, mucosum collectis, rectis, ad apices distin- 

 cte attenuatis, dilute c;eruIeo-oIivaceis; articulis sph;erico- v. ellipti- 

 co-depressis, laxe connexis, granuhitis; heterocystis globosis, arti- 

 culos vegetativos subsequantibus, s;i3pe solitariis aut (inter sporas) 

 binis; sporis oblongo-ellipticis aut cylindraceis, viridi-fuscescentibus 

 V. olivaceis, granulis minutissimis farctis, exosporio tenui, levissimo. 



Hah. in truncis vetustis putrescentibus Salicis albse ad Val- 

 lumbrosam It;ili;n (BoRzii — Obs. An Nodularim sp. ? 



43. Anabaena cupressophila Wolle Freshw. Alg. of U. S. pag. 288, 



