jriaeese, Dictyosporse, Pyrenophora. 287 



bus obvallatis, octospqris ; sporidiis distichis, ovato-oblongis, 34- 

 40 s 15-17, utrinque rotundatis, sed polo superiore obtusiore, 13- 

 15-septatis, denseque rauriformibus, ad septa lenissirae (ad medium 

 distinctius) constrictis, fuligineis. 



Hab. in caulibus herbarnm majorum putrescentibus in Pa- 

 daster-Thal prope Trins in Tyroiia, Aug. 1874 (P. Magnus). — 

 Sporidiis creberrirae septatis peritheciisque pilosellis a ceteris spe- 

 ciebus affinibus facile distinguitur. 



27. Pyrenophora lanuginosa Sacc. Mich. I, 120, (Pleosp.) F. it. t. 545. 3867 

 — Peritheciis tectis gregariis globoso-corapressis, majusculis, Vg" 1 /^ 

 mill. diam., extus undique breve griseo-lanuginosis, pilis ramosis 

 intricatis continuis fuscidulis; ostiolo punctiformi papillato, epider- 

 midem vix perforante; perithecii contextu distincte celluloso fuli- 

 gineo; ascis cylindraceo-clavatis, mediocriter noduloso-stipitatis, 

 apice tunica integra rotundatis, 140-150-16-18, paraphysibus nul- 



lis genuinis, octosporis ; sporidiis distichis oblongo-fusoideis rectis 

 curvulisve, 30-36 ~ 8, 5-6-septatis ad septa tandem leniter con- 

 strictis, septis longitudinalibus 1-3, 1-seriatis, dilute melleis. 



Hab. in vaginis graminum majorum (Glycer iae 1 ?) in Ausgang 

 des Parkes von Lanke nach Riesenthal, in Marchia Brandeuburg 

 (P. MAGNih). — Perithecia quandoque in pagina interiore vagina- 

 rum seminudata basique (Gnomoniw devexce ad instar) umbili- 

 cata conspiciuntur. Species a ceteris mihi notis conspicue diversa. 



28, Pyrenophora hispidula (Niessl) Sacc. Pleospora hispidula Niessl 3sf>s 

 Not. pag. 32. — Peritheciis sparsis in matrice vix mutata, tectis, 

 globosis, exiguis, 100-130 u.. diam., coriaceo-membranaceis, atris, 

 basi fibrillosis, vertice setis rigidis, sparsis, rectis, atris, 45 u. cir- 



ca long., instructis, ostiolo minutissimo papil!a?formi fimbriato vel 

 penicillato; ascis multis, obiongo-clavatis, 90-95 s 18-22, stipite 

 brevi curvato, 8-sporis; sporidiis stipate distichis, elongato-ovoi- 

 deis, utrinque obtuse rotundatis, plerumque rectis, 24-20-11 12, 

 transverse 7-septatis, medio leniter constrictis, in longitudine 1- 

 3-septatis, atro-fuscis, episporio tenuissime obscure striato; para- 

 physibus distinctis, multis, superantibus, laxe ramulosis. 



Hab. iu Carice ustulata. Valee des baignes, Helvetiac. 

 20. Pyrenophora parvula (Speg.) Sacc. Pleospora parvula Speg. F. %m 

 Arg. Pug. IV, n. 170. — Peritheciis globulosis, 100-250 n.. diam,, 

 erumpenti-superficialibus vel subimmersis, atris, tomentello hispi- 

 tlis, membranaceis, ostiolo non vei vix papillulato, subcarbonaceo, 

 contextu subindistincte parenchymatico, celluiis ollipticis; hyphis 



