Pyrenomycetse, Sphseriacefe, Hyalodidymae, Didymella. 653 



10. Venturia nebulosa Ell. et Ev. in Journ. of Mycol. 1902, p. 66. 2214 

 — Amphigena; maculis ellipticis 2-5 mm. diam. vel connuenti- 

 bus; peritlieciis ovato-globosis 75-100 ;j.. cliam., superne erumpen- 

 tibus, membranaceis, setulis nigris, continuis 30-40 « 3 vestitis; 

 ascis oblongis, abrupte basi contractis et breve stipitatis, aparaphy- 

 satis 35-45 « 12-15; sporidiis distichis, oblongo-ovatis, hyalinis, 

 1-septatis, parce constrictis, 12-15 « 5. 



Hab. in foliis emortuis Eragrostidis spec. Alabama Amor. 

 bor. — V. erysiphoidi E. et E. et V. graminicoloe Wint. affinis. 



DIDYMELLA Sacc. - Syll. I p. 545, IX p. 661, XI p. 301, XIV 

 p. 535, XVI p. 479. 



1. Didymella confertissima Sacc. Atti congr. bot. di Palermo 1902, p. 50. 2215 

 — Peritheciis longe lateque effusis, confertissirnis, maculas latas 

 atras formantibus, innato-prominulis, globosis, vix papillatis, poro 

 latiusculo pertusis, 180-200 ;x. d., nigris, intus albis; contextu pa- 

 renchymatico, duriusculo, fuligineo, ostioli periphysibus subhyali- 

 nis; ascis rosulatis, oblongo-clavatis, apice rotundatis, doorsum 

 sensim tenuatis 85-100 « 24-28, octosporis ; paraphysibus crassis, 

 articulatis, mox dilabentibus; sporidiis distichis vel subtristichis 

 oblongo-clavulatis 25-35 « 8-9, medio 1-septatis, non v. vix con- 

 strictis, apice paullulo obtusioribus, liyalinis, eguttatis. 



Hab. in cortice Cactece cujusdam, Rio de Janeiro Brasiliae 

 (E. Ule). — Socia adest Exosporii species imperfecte evoluta. 



2. Didymella fusispora Mc. Alp. Fung. diseas. Stone-fr. trees, Mell>. 2216 



1902, p. 124, f. 255-257. — Peritheciis sparsis, minutis, nigris, erum- 

 pentibus, globosis, membranaceis, initio subcutaneis, dein superfi- 

 cialibus, poro pertusis 120-150 ;j.. diam.; ascis oblongis basi con- 

 strictis, octosporis 34-37 «13; paraphysibus numerosis, filiformi- 

 bus; sporidiis conglobatis, fusiformibus, curvulis, 1-septatis, utrin- 

 que acutis non constrictis 26-28 ^ 3,5-4. 



Hab. in ligno emortuo Pruni Armeniacse, Armadalo Au- 

 stralise. 



3. Didymella apiculata Feltg. Vorstud. Pilz. Luxomb. Nachtr. III, 22n 



1903, p. 251. — Peritheciis grogariis omnino toctis, globosis, basi 

 subapplanatis 300-400 u.. diam., ostiolo breve cylindraceo v. conoi- 

 deo epidermidem perforante; ascis anguste olavatis, apioe subro- 

 tundatis, breve stipitatis, filiformi-paraphysatis 6-8-sporis 50-7'2 

 8-10; sporidiis mono-distichis, fusiformibus, utrinquo aoutato-api- 



