520 Phycomycetae, PeronospoiracesB, Plasmopafd.. 



SCLEROSPORA Schroet. — Syll. VII p. 238, IX p. 341, XIV, 461. 



1. Sclerospora graminicola (Sacc.) Sekroet. — Syll. VII, p. 238. — '~ r > : s 

 var. Setariae-italicae Travorso in Bull. Soc. botanica ital. 1902, 

 n. 9, p. 168. — A typo differt oosporis majoribus, nempe 39-45 

 [>.. diam. nec 23-38 (sine tuniea oogoniali); tunica oogoniali, magis 

 regulariter spliserica, 7-11 ;j.. cr. nec 4-6; tota spora denique 53- 

 04 ;j.. diam. nec 39-55; differt etiam tunica oosporarum tenuiori. 

 Status eonidiophorus ignotus videtur. 



Hab. in foliis et spicis (in virescentiam inductis) Setari.r 

 italicse, Albosaggia, prope Sondrio, Ital. bor. et in America bor. 



PLASMOPARA Schroet. — Syll. VII p. 239, IX p. 342, XI p. 243, 

 XIV p. 460. 



1. Plasmopara Vincetoxici Ell. et Ev. in Journ. of Mycol. 1902, p. 70. 1764 



— Caespitulis hypophyllis, albis, 3-4 mm. diam., in longifcudinem 



subconfluentibus et in pagina inferiore maculas, brunneas effor- 

 mantibus; conidiosporis brunneis continuis, 8-10 \i. cr., superne 

 2-3-ramosis; ramis ultimis sterigmata 8-10 [L. long. ferentibus; 

 eonidiis globosis vel breve elliptieis circ. 15*13; oosporis glo- 

 bosis brunneis circ. 20 [j.. diam. 



Hab. in foliis Vincetoxici spec, Alabama Amerieie. 



2. Plasmopara cubensis B. et C.) Humphrey in Mass. Agric. Stat. 1765 

 Rep. 1890. p. 210, t. II, f. 11-14, Peronospora cubensis B. et C. 



— Syll. VII, p. 261, ubi diagnosis ex B. et C. imperfecta — Oogo- 

 niis adhuc ignotis; conidiis basi apiculatis, 22-25*15-17, typice 

 violaceis (ex Humphrey) v. olivaceo-brunneis (a nobis visis). 



Hdb. in foliis Cucumeris sativi, C. Melonis, Cucur- 

 bitae Peponis, Cocciniae, Momordicse, Melothriae, Sicyi 

 aliisque Cucurbitaceis in Java, Amer. bor., Africa orient., Man- 

 ciuria, Japonia, Britannia, Austria, Italia, Hungaria, Rossia. — 

 var. tweriensis Rostowzen. in Flora 1903, p. 405: conidiophoris 

 et conidiis quam in typo paullo erassioribus. In fol. Cueumeris 

 sativi, Twer Rossire. — var. atra Zimm. in Contralbl f Bakter. 

 1902, p. 148: conidiis 24-26*16-20 griseo-atris. In fol. Cueur- 

 bit:i', in Java (Verisimiliter ufcraque var. vix eonsideranda). Cl. 

 Rostowzen 1. c pro hac specie genus instituit novum (Pseudo- 

 peronospora) mcdium, teste auctore, inter Peronosporam (cujua 

 habet eonidiophora) et Plasmoparam eujus haberet conidia pla- 

 smopara, sed non conidiopliora). Sed ros ulterius inquirenda. 



