Algen. 321 



Thnllus lacnnoso-spongiosns, tremulus; articuli 4 ," crassi; 

 sporae ovales vel subsphaericae, 7 f^ crassae, 7 — 10 ^i 

 longae, episporio laevi hyalino 17. iV foliaceum Mongeot. 



Thallus prinnim globosus, dein in laininam irregulärem mem- 

 branaceam vel filiformem expansus, peridennide firmo; 

 articuli 4,5 — 6 ," crassi 18. N. commune Vauch. 



Thallus sphaericus, aetate provecta plus minus depressus et 

 lobatus, peridermide firma, articuli 4 — 5 ,« crassi; sporae 

 ovales 5 « crassae, 7 ," longae, episporio laevi fusces- 

 cente 19. ^- sphaericiim Vauch. 



Thallus sphaericus vel membranaceo-explanatus ; triehomata 



2,5 — 3 ," crassa 20. N. mimitum Desm. 



Sectio VII. Plantae terrestres vel aquaticae sphaericae, peridermide firmo 



PRUNIFORMIA. 



A. Plantae terrestres. 



Thallus minimus triehomata 8 — 9 /< crassa ; sporae sphaeri- 

 cae, vel sphaerico-depressae, articulis duplo triplove 

 majores; episporio laevissimo 21. N. macrocarptim 



Menegh. 



Thallus ad centimetrum latus, subpellucidus ; triehomata 

 5 — 8 fi crassa, in sicco caerulescentia ; articuli sub- 

 sphaerici ; sporae ovales, 6 — 7 ,« crassae ; 9 — 15 f^ longae 



22. N. mieroscopicum Carmich. 



Thallus parvas; triehomata 4 — 7/^ crassa; sporae exacte 

 sphaericae 6 — 7 /* crassae, episporio crassiusculo 

 scabro aureo-fuscescente 23. N. sphaeroides Kütz. 



B. Plantae aquaticae. 



1. Triehomata dense intricata; thallus mediocris magni- 

 tudinis circiter Pisi. 



Thalli gregarii pellucidi, caerulescentes, triehomata 

 5 — 7 /^ crassa; articuli saepe (in sicco) grosse granu- 

 losi subopaci 24. N. coeruleiim Lyngb. 



Thallus prasino-viridis ; triehomata 6 — 8 /^ crassa 



* 25. N. edide Berk. et Mont. 



2. Triehomata laxius implicata, a centro radiantia ; thallus 

 pollicaris et ultra. 



Thallus superficie coriaceus, olivaceus vel saturate 



aerugineus, demum fusco-nigrescens, triehomata 4 - 5 /« 



crassa 26. N. pruniforme (Roth) Ag. 



Sectio VIII. Plantae aquaticae affixae ; thallus subglobosus bullatus, rarius 



disciformis, peridermide firmo ; triehomata tenuia 



VERRUCOSA. 

 Fila flexuoso-contorta eximie cylindrica, triehomata 3 — 3,5 j" 

 crassa; sporae ovales 5 /' crassae, 7 /' longae, episporio 

 laevi 27. N. verrucosum (L.) Vauch. 



Fila a centro radiantia flexuosa, ad superficiem densissime 

 contorto-implicata; triehomata 4 ju crassa; sporae ovales, 

 4 — 5 fi latae, 7 — 8 « longae, episporio laevi 



28. N. parmelioides Kütz. 



Sectio IX. Planta aquatica globosa; thallus durus in lobulos radiatim 



facile secedens ZETTERSTEDTIANA. 



Fila a centro radiantia flexuosa, ad superficiem densissime 



intricata, triehomata 4 /< crassa; heterocystae subsphaericae 



saepe seriatae 29. N. Zetterstedtii Aresch. 



XXIV. WoUea Bornet et Flahault * W. saccata B. et F. (Sphaerozyga saccata 



Wolle). 



XXV. Anahaena Bory. 



Sectio I. Sporae ovales vel sphaericae TRICHORMUS. 



-j- Sporae ovales vel doliiformes ab heterocystis remotae, 



seriatae. 



Episporium laeve- 1. A. variahilis (Kütz.) 



Episporium papillosum 2. A. hallensis (Jancz.) B. et F. 



Botan. Centralbl. Bd. XLI. 1890. 22 



