180 



lie. BORIVl^T ET CH. FLA.HA.IJLT. 



GeNERUM NoSTOCEARUM CLA.VIS ANALYTICA. 



XXIIL NosToc. 



XXIV. WOLLEA. 



SuB-TRiBUS I. Anabœneœ. — Vagiuse inconspicuaî vel mucosic iliflliie:": 

 tes, vel gelatinosse firmiores crassEB. 



A. Fila flexuoso-conlorta in tliallum 

 peridermide definito cinclum con- 

 creta , 



B. Fila subrecta, parallela, in tlial- 

 lum tubiilosum cylindricum molle 

 agglutinata 



c. Fila subrecta libéra aut muco 

 molliori iastratum indefinilum vel 

 in floccos irregulares, vel in lami- 

 nulas conglutinala. 

 t Hcterocyslte et sporœ interca- 

 lares. 



Sporse solitarise, aut ab hete- 



rocystis remotre, aut liete- 



rocystis contigua^ ; Iriolio- 



mata nuda vel vaginata, 



libéra aut muco iuvoluta in 



strata vel in floccos amor- 



plios aggregala ; articuli 



diameiro ai'quales vel lon- 



giores 



Sporaecylindricsesparsae; iri- 



chomata brevia in laminu- 



las plumosas vel fusiformes 



parallcliler aggregata eva- 



XXV. Anabjo.na. 



XXVI. Apiianizomenox. 



Sporte seriata; ab heterocys- 

 tis remota), evolutione cen- 

 trifuga; fila libéra, vaginis 

 tenuissimis sœpe evanes- 

 centibus circumdata; arti- 

 culi brèves, depressi, dis- 



citormes 



ii Heterocyslse terminales; spo- 

 r* heterocyslis coiitiguœ. . 

 Sun-TRiBus II. Auksireœ. — Vaginai te- 



XXVIl. NODULARFA. 



XXVIII. Cylindrospermum 



