20 Perisporiacese, Erysipheae, Erysiphe. 



Hab. in foliis Bidentis frondosae et B. conn;it{e in Amer. 

 bor. Pensylv., North Greenbush. Aut. — Sec. Peclc ad Sphcero- 

 fhecam spectat. 



20. Erysiphe Erodii Dur, et Mont. FL Alg.. 1, p. 567. Mont. Syllog. 73 

 Crypt. N. 903. — Amphigena; mycelio nulio; peritheciis sphairi- 

 cis minutis rigidis fusco-nigris, appendicibus simplicibus rtexuosis 

 albis; ascis piuribus, globosis, 8-sporis 80 /. diam., sporidiis ovoi- 

 deo-oblougis 20 tj.. long. 



Hab.m foliis Erodii moschati, Oran (Durieu). — Ifec ad 

 Sphivrothecam Castagnei var, A. Lev. spectat sec. Lev., sed asci 

 plures, ergo non Sphceroiheca. 



2L Erysiphe lanuginosa Fuck. in Thuem. Myk. Not. von Griechon- 71 

 land (P)Ot. Zeit. 1871 n. 2). — Mycelio conidiophoro dense lanugino- 

 so-tomentoso, candido, late effuso, cauies foliaque tota occupante ; 

 conidiis oblongo-ovatis utrinque obtusis 32 s 16; peritheciis spar- 

 sis villo immersis, planis, aterriniis, media magnitudine; ascis obli- 

 que stipitatis, oblougis, 84 :; 28, 8-12-sporis; sporidiis ovatis con- 

 tinuis, hyalinis, 12 s 3. 

 Hab. Gra3cia, Kephyssus, in Dauco maxirao (Heldreich), 



Species inquirendse. 



22. ?Erysiphe Rubi Fuck Symb. myc. p. 96. — Peritlieciis ascophoris - 

 ignotis; mycelio tenui, arachnoideo, niveo; conidiis ovoideis, api- 

 ce rotundatis, basi truncatis, 28^17; ? peritheciis pycnidicis C?/- 

 cinnobolas) stipitatis, oblongo-ovoideis, flavis; stylosporis (((sper- 

 matiis?))) ovoideis, inaequilateralibus, hyalinis, 8^:4. 



Hab. in utraque pag. foliorum Rubi fruticosi in Germania, 

 Gallia, Lusitania. — Perithecia s. d. pycnidica forte mera para- 

 sitica nec metagenetica sunt. 



23. FEryslphe Tuckerl Berk., Kickx Fl. crypt. Fl. I. :J82. — Peri si 

 theciis ascophoris ignotis ; mycelio effuso arachnoideo-pruinoso, 

 albicante, conidiis ovoideis v. ellipsoideis, moniliformi-connexis 

 [Oidium Tuckeri Berk.);? peritheciis pycnidicis (Cicinnobolus 

 Cesatii de Rary, Endogonium Vilis Crocq.) minutissimis ovoideis 

 subpedicellatis, v. globulosis et sub.sessilibus ; stylosporis ((( sper- 

 matiis?») ovoideis, obtusis, rectis curvulisve. 



Hab. in foliis, fructibusque Vitis vinifera\ ubicumque h;rc 

 excolitur v. sponte nascitur. — An peritiiecia pycnidica Frysiphes 

 proles V. ejusdem mere parasitica sint dubium raanet: iramo cL de 

 Bary hanc postreraam opinionem magis probabilem cen.set. Peri- 



