Myxophycese, Heterocystidese, Nostoc. 489 



Phyc. Gencr. p. 171, Phyc. genu. p. 148, Sp. Alg. p. 211, Tub. 

 Phyc. [, t. 10, f. 67, Rab. Fl. Eur. Alg. 11, p. 55, f. 9, Nostoc 

 HederuUu Menegh. iu Kuetz. Sp. Alg. p. 287, Born. et Thur. Not. 

 Alg. p. 85, Born. et Fl. Rev. IV, p. 189, Lagerh. in W. N. et La- 

 gerh. Alg. exs. n. 1330!, Hansg. Prodr. 11, p. 56, Anahcena He- 

 derulm Kuetz. Sp. Alg. p. 287, Tab. Phyc. I, p. 50, t. 92, f. Vll, 

 Anabcma chalijbea p amethystea Kiietz. Sp. Alg. p. 288, 1819, 

 Microcystis punctiformis Kirchn. Algenfl. v. Schles. pag. 256, 

 Hormosiphon granularis Kuetz. Sp. Alg. p. 301, Tab. Phyc. I, 

 p. 5, t. 94, f. VII. — Thallis niinimis, subglobosis, ad 2 decimil- 

 linietra latis, sparsis vel contluentibiis, adnatis; filis flexuosis, den- 

 sissime iniplicatis; vaginis arctis, hyalinis, mucosis; trichomatibus 

 3-4 [i.. crassis, saturate aerugineis ; articulis globoso-depressis vel 

 ellipticis ; heterocystis 4-6 (J.. crassis, hyalinis; sporis subsphteri- 

 cis vel oblongis, 5-6 [jl. latis, 5-8 {i. longis, episporio crasso, kevi, 

 contentu minute granuloso, dilute olivaceo. 



Hab. ad folia Lemnarum, nec non ad parietes aquarii horti 

 Patavini in Italia superiore (Meneghini, De Toni) et epiphytice in 

 horto florentino (Pampaloni), passim prajterea in Montenigro 

 (ScHMiDLE), ad terram humidam humosam in Helvetia et HoIIandia 

 (KuETZiNG), in Dania (Rosenvinge, Nordstedt), in lacu Constantife 

 (Kirchner), in Austria (Schiedermayr), Bohemia (Hansgirg), Silesia 

 (KiRCHNER, Schmula), ct passim in Germania (M. Schmidt etc), 

 Polonia (Kozlowski), « Fiskebfichskil » in Bahusia (Nordstedt), in 

 India (Hansgirg), Brasilia (Moebius), .Equatoria (Lagerheim), ins. 

 Azoricis (Bohlin), ins. Sandwicensibus (Berggreen, Schauinslandj 

 et Samoensibus (Schmidle), in thallo Peltigerae caninae (Ba- 

 ranetzski), in cephalodiis Lobarige amplissimae et in pseudo- 

 cephalodiis P s o r o m a ti s H y p n o r u m ( Forssell ) , Pannariae 

 (Schwendener), Lepidocollematis et Leprocollematis Brasiliae (Wai- 

 Nio), in lacunis intercellularibus Gunnerae (Lagerheim) et in radi- 

 cibus Cycadearum (Nordstedt). — De rehitione hujus algse cum 

 tuberculis radicalibus Cycadearum disseruit etiam cl. Pampaloni, 

 qui putat algam parasitice vivere in illis (cfr. Pampaloni in N. 

 G. Bot. It. vol. VIII, n. 4 (1901)). 



Sectlo IIL Paludosa Bovn. et Flah. Rev. IV^ p. 190. — Aquaticae, raajores, ge- 

 latinos», fragiles, initio globosse, deinde laceratae et irregulariter expansse. 



4. Nostoc entophytum Born. et Flah. Rev. IV. p. 190, Nostoc te- 

 nnissimum liornet in Bornet et Thuret Notes Algologiques p. 86 



943 



