598 Myxopliycese, Rivulariacefe, Leptochsete. 



Multiplicatio hormogoniis et gonidiis cliroococcoideis ex articulorum 

 basalium transmutatione ortis. 



Sectio L DiAPHANOCH^TE Nob. — Species vaginis achrois vel pallidissime lu- 

 teolis instractse. 



1. LeptochaBte crustacea Borzi Morf. loc cit. p. 29S, Born. et Flah. 

 Rev. I, p. 342. — Strato fusco-nigro, late expanso; trichomatibus 

 arcte indistincte articulatis, ad 8 {j.. crassis. 



Hah. ad saxa schistacea irrorata in Apennino Tusciae (BoRzi); 

 ad S. Magdalenam Tyroli;e (Hansgirg); in Fuegia (Borge). — Var. 

 gracilis Hansg. Beitr. z. Kenntn. d. Siissw. Alg. u. Bact. Fl. in 

 Sitzungsher. d. Konigl, Bohm. Ges. d. Wissensch. (1892) p. 138: 

 strato crustaceo, superficie leviter verrucoso, insequali; filamentis 

 luteo- vel nigro-brunneis, plerumque 4-5 [jl. crassis, 300 [x. rarius 

 ultra longis, apice superiori subtiliter acuminato achrois, dense ag- 

 gregatis subparallelis, inconspicue articulatis, vaginis luteolis vel 

 aureis arctissimis, — In rupibus calcareis inter «Halts» et « S. 

 Magdalena» prope Alam et «Auer» in Tyrolia (Hansgirg). 



2. Leptochaete fonticola Borzi Morf. etc. in N. G. B. It. XIV, p. 298, B. 

 etPl. Rev. I, p. 342. — Strato fusco-purpureo, late effuso, crusta- 

 ceo, lubrico; trichomatibus distincte vaginatis, vagina hinc et illinc 

 annulatim fissa, ad 8 [x. crassis. 



Hdb. ad saxa in fontibus ad Vallumbrosam Italia? (Borzi). 



3. Leptochaete parasitica Borzi Morf. p. 298, B. et FI. Rev. I, p. 342, 

 J. Schm. Cyan. Dan. p. 386-387. — Strato minimo, pulvinato, di- 

 lute coeruleo vel coeruleo-viridi; filamentis rectis vel subrectis, pa- 

 rallelis; vaginis plerumque tenuibus, achrois; trichomatibus tener- 

 rimis, ad 2 [l. crassis. 



Kah. ad caulem Potamogetonis crispi apud Vallumbro- 

 sam Italite (BoRzi), sociis Calotriche Juliana et ChanifBsi- 

 phone confervicola in pedunculis etc. plantarum in Selamlia 

 (Ostenfeld). 



4. Leptochaete amara P. Richt. in Kuntze Rev. Gen. pl. III (1898), 

 p. 385 c. ic. — Strato gelineo, effuso, Iffite seruginoso, siccitate cru- 

 staceo obscure cyaneo; filamentis pallidis vel hyalinis, intricatis 

 et fascicnlatis, circ. 2 [i. crassis; trichomatibus arcte vaginatis, in- 

 conspicue articulatis; articulis 1,5 [jl. diam., subrotundis. 



llah. in fonte nitrosa vel sulphurata 35" cal. ins. Jav;e (Kuntze). 



5. LeptochaBte Hansgirgi Schmidle Hansgirg's Ind. Alg. in Allg. bot. 



