504 Ustilaginese, Dictyosporae, Doassansia. 



orbicularibus, 5-10 mra. latis, amphigeifis, pallide flavescentibus, 

 centro obscurioribus dispositis; sporis irregulariter globosis, sub- 

 angulato-corapressis, pleruraque 9-14 :i9-12, episporio crassiusculo, 

 levi, flavescenti vel subhyalino donatis, plasmate subtiliter granu- 

 loso foetis, rarius biguttatis, tegumento communi bene evoluto, 

 brunneo; sporidiolis ut in specie pra^cedente. 



Hab. in foliis Sagittaria? sagittifoliae, variabilis et 

 monte vidensis in Italia, Gallia, Germania, Britannia, Belgio nec 

 non Missouri Americse borealis et Republica Argentina Americae 

 australis. 

 2 3. Doassansia Martianoffiana (Thiim.) Schroet. Pilzfl. Schles. p. 287, 

 De-Toni Revis. of Doassansia in Journ. of mycol. 1888, p. 16, 

 Proiomyces Martianoffianus Thum. Pilzfl. Sibir. II, n. 123, Berl. 

 et De-Toni Syll. Phycom. in Sacc. Syll. Fung. omnium VII. p. 320, 

 n. 1125. — Soris hypophyllis, subpustuliformibus, ochraceo-fusci- 

 dulis, ut plurimum 60-80 a. diam. metientibus, numerosis, dense 

 gregariis, in maculis usque ad 5 ram. latis, orbicularibus, iudeter- 

 minatis, haud marginatis, flavescentibus dispositis maculasque con- 

 trapositas (epiphyllas) aurantiaco-fuscas haud limitatas efficienti- 

 bus ; sporis irregulariter globosis vel elliptico-globosis, plerumque 

 9-11, rarius 16 u.. diam., episporio tenui, levi, dilute brunneolo, 

 plasmate subtiliter granuloso, pallido foetis, tegumento communi 

 arcte adnato pallido. 



Hab. in foliis vivis fructibusque P otam ogeton is natantis 

 et grarainei in Silesia Germaniae et prope Minussinsk Sibirire 

 asiaticse. 

 4. Doassansia occulta (Hoff^m.) Cornu in Farlow Notes on a Fun- 

 gus parasitic on species of Potamogeton p. 2, De-Toni Revis. of 

 Doassansia in Journ. of Mycol. 1888, p. 16, Sclerotium occultum 

 Iloff^m. Icon. Anal. Fung. p. 69, t. XVI, f. 3, (1862), Doassansm 

 Farloioii Cornu Sur quelques Ustilaginees nouvelles ou peu con- 

 nues in Ann. Scienc. Nat. 1883, p. 287. — Soris ovatis vel glo- 

 bosis, ovariicolis, brunneis, compressis, numerosis, sparsis, 180- 

 200 [x. longis, 140-180 a. latis ; sporis (immaturis?) globuiosis, 

 20 [j.. circ. diara., pallide coloratis, tegumento communi obscurio- 

 ri bene evoluto. 



Hab. in ovariis Potamogetonis natantis et lucentis 

 in Germania (Irmisch et Hoffma^jn) nec non in ovariis Pot. Va- 

 seyi, pusilli, perfoliati var. lanceolati, natantis Ot- 

 tawa Americfc borealis (J. Flechter). 



