Phycomycetsfj, Chytridiacefe, Pyroctonum. 449 



pag. 209. — Maculis nigris v. bruiineis, irregularibus, sparsis v. 

 confluentibus, ampliigenis, minutissimis, sed etiam usque ad 8-16 

 cm. longis; sporis hemisplisericis, planis v. concavis, episporio 

 crasso, levi, brunneo, 18-20 y- 10-12. 



Hab. in foliis vivis Asphodelorum in Tunisia et Algeria. 

 B. Cladochytrium Urgineae Pat. et Trab. Bull. Soc. Mycol. de France, 

 1897, p. 210. — Maculis ovalibus v. sabrotimdis, 1-2 cm. longis, 1700 

 8-15 mm. latis, rubescentibus v. brunneis, opacis; sporis 2-3 v. 

 pluribus, primo iiyalinis, dein brunneis, hemispligericis, 22-27 ^- 

 12-14. 



Hah. in foliis Urgineae maritimas in Algeria (Tkabut). 



6. Cladocfiytrium Tmesipteridis Dang. Le Botan. 1891, p. 223, t. X, noi 

 fig. 1-2, t. XY, f. 15. — Mycelio toruioideo, effuso, brunneo, fila- 

 mentis laxe intricatis; sporangiis spbaericis apicalibus v. interca- 

 laribus, brunneis, ssepe grosse 1-guttulatis; oosporis globosis, bi~ 

 tunicatis, coloratis. 



Had. in rbizomate Tmesipteridis in Nova Caledonia. 



7. Cladochytrium viticolum Prunet, Compt. rend. Ac. Sc. 1894, pp. 1702 

 108, 808, 1233, Zeitsch. Pii. Krank. 1895, p. 181. — Maculas brun- 

 neas punctiformes sistens; sporangiis perdurantibus primo vere zoo- 

 sporiparis, zoosporis cito germinantibus, mycelio tenuissimo e zoo- 

 sporis oriente et in matricis plures partes penetrante, dein zoospo- 

 rangia uniceUularia gignente; sporangiis hiemali tempore iterum 

 efformatis. 



Ha^. in contextu hgneo Yitis viniferaein Gallia, Algeria, 

 Tunisia, Amer. bor. — Generat morbum, qui audit Gommos^ bacil- 

 laire, brunissure, mal nero etc. 



8. Cladochytrium Mori Prunet, Compt. rend. Ac. Sc. 1895, p. 222, 1703 

 Zeitsch. Pfl. Krank. 1896, p. 22. — Vix differt a Cladochytrio vi- 

 ticolo magnitudine sporangiorum et zoosporarum. 



Hab. in contextu ligneo Mori in Gallia merid. 



9. Cladochytrium tuberculorum Vuill. Ann. Sc. Agron. I, 1888, 1704 

 p. 75-77. — Filamentis mucilagineis hinc inde in zoosporangia 

 hieme maturescentia intumescentibus; zoosporis uniciliatis. 



Hah. in tuberculis radicalibus Leguminosarum in horto bot. 

 Nancy Gallise, 



PYROCTONUM Prunet, Rev. Mycol. 1897, p. 91 (Etym. pyros triticum 

 cereale et ctonos occisio). — Mycelium in matrice late effusum, e fila- 

 mentis tenuissimis compositum. Zoosporangia ex vesicuiis filamen- 



29 



