858 Phycomycetse. Ppronosporacese, Cystopus. 



quam Cycloptericola marina nuucupat, in stomacho piscis Cyclo- 

 pteri Lumpi in mari Baltico lecti. Fungillus prima setate pr^ebet 

 protosporas globosas, 22 [).. diam , intus granulosas, ex quibus ori- 

 tur mycelium filiforme usque ad 100-125 ;j,. longum, sporas glo- 

 bosas proferens. Ulteriores not;e desiderantur. 



Fam. 5. Peronosporacete De Bary. 



CYSTOPUS Lev — Syll. VII p. 233, IX p. 340, XI p. 242, XIV 

 p. 458. XVI p. 396, XVII p. 519. 



1. Cystopus Swertlae (Berl. et Kom.) Saec. et Trott., Alhugo Swertice 3292 

 (Berl. et Kom ) Wils., Bull. Torr. Bot. Club, XXXIV (1907) p. 72, 

 Cystopus Convolmilacearum Speg. var. Stcertice Berl. ot Kom. in 

 Berl. Saggio Monogr. Peronosp. Portici (1903) pag. 100. — Soris 

 sparsis, ovoideo-rotundatis, parvis, 1,6 mm. long., coniiuendo lon- 

 gioribus v. sinuosis, hypopliyllis, albido-lutescentibus, demum epi- 

 dermide rupta pulverulentis, inflatulis; conidiophoris clavatis pa- 

 rallele dense stipatis; conidiis e globoso cuboideis, medio anulo 

 interno incrassato distinetissimo prioditis, 12-16 «^ 11-13, hyalinis; 

 oogoniis globuloso-ovoideis, membrana tenui prteditis; oosporis 

 globosis, perinio amcene denseque reticulato-papiliulato, 45-50 '^j.. 

 diam., luteis. 



Ilab. in foHis vivis Swertire cognat;i3, Amur Manciuriaa 



rOSsic;C fKOMAROFF). 



2. Cystopus Trianthemae (Wils.) Sacc. et Trott. Albugo TrianthemcB -^293 

 Wils., Bull. Torr. Bot. Club XXXV (1908) p. 361. — Soris hy- 

 pophyllis, rotundis v. irregularibus, rarius confluentibus, immersis 

 prominentibusque, subflavidis, 1-10 mm. lat. ; conidiophoris cylin- 

 draceis, 60 * 10; conidiis subflavis breviter cylindraceis, 8-10 a., ter- 

 minalibus majoribus, 12-14 « 9-11, membrana hyalina, ad medium 

 anulo cincta; oosporis in foliis hospitis globosis, 60-80 a. diam., 

 episporio brunneo regulariter vel irregulariter reticulato, areolis 



.4 \i.. diam. 



Ilab. in foliis Trianthem;TD Portulacastri, Las Cruces 

 New Mexico xAmer. bor. (E. 0. Wooton). 



3. Cystopus Bliti Biv.) De Bary - Syll. VII, p. 230. — f. Achy- 3234 

 ranthis P. Henn , in Fl. du Bas- et Moy. Congo, in Ann. Mus. 



du Congo v. II. fasc. II (1907) p. 85. 





