38 Pyrenomycetse, Perisporiaceae, Dimerium. 



epiphyllis, nigerrimis, opacis, 2-4 mm. diam. vel confluentibus ; 

 peritlieciis giobosis, atris, ubique sparsis, contextu fuligineo pa- 

 renchymatico, 80-110 a. diam , circum circa setulis brevibus for- 

 titer uncinato-recurvatis, loete fuscis, basi nig»escenti suffultis, 14- 

 18 ;a. altis (extensis 24-28 a. longis; 3-4 [a. cr., obsitis; ascis elli- 

 psoideo-cylindricis, 18-26*5-6; sporidiis brunneolis, distichis, 1- 

 septatis, 6-7 - 2-2,5, cellulis subaequalibus. 



Hdb. in foliis Cestri lanuginosi epiphylla, Sao Leopoldo, 

 Rio Grande do Sul Brasiliie. 



Sect. 4. Ph.Todidynije. 



DIMERIUM Sacc. et Syd. - Syll. XYI p. 410, XVII p. 537. 



1. Dlmerium elegans Syd., Ann. Mycol. VII (1909) p. 174. -- Epi- 343-1 

 phyllum, plagulas orbicuiares 1-3 mm. latas atras elevato-discoi- 

 deas velutinas efformans ; peritheciis 10-30 in quaque plagula dense 

 aggregatis, saepe concentrice dispositis, globosis, atris, nitidis, asto- 

 mis, demum centro leniter collabescentibus, 200-275 ;j.. diam., basi 

 hyphis mvcelicis numerosissimis radiantibus atris, haud ramosis 

 parce septatis, usque ad 350 ;x. longis, 8-11 ;j.. crass. ubique cin- 

 ctis; ascis clavatis, apice rotundatis, basi in pedicellum attenuatis, 

 100-140^18-22, 4-8poris; sporidiis mouostichis, ellipsoideis, utrin- 

 que rotundatis, primo continui? hyalinis, dein medio 1-septatis, 

 fuhgineis, non constrictis, 21-30^10-14; paraphysibus numerosis, 

 hyalinis, crassiusculis (3-4 ;j..). 



Hah. in foliis Pasaniae cuspidatae Kura-mura Tosa Ja- 

 poniae (Yoshinaga). 



2. Dimerium Autrani (Henn.) Sacc. et Trott. Dimerosporium Autrani 3436 

 Henn. in Buli. Herb. Boiss. (1893) p. 116, t. V, f. 15. — Mycelio 

 epiphyllo, crustaceo nigro, maculis rotundatis ssepe confluentibus 



e filis ramosis fuligineis constanti; peritheciis e mycelio erumpen- 

 tibus, gregariis, globosis, atro-fuscis, rugulosis, usque ad 90 ;j.. 

 diam. ; ascis obovoideis, hyalinis, subsessilibus, octosporis, 30-42 w 

 24-28; sporidiis distichis, ellipsoideis v. subclavatis, medio 1-se- 

 ptatis, leviter constrictis, utrinque obtusis, subfuscis, 17-21 * 7-9. 

 ITah. in foliis vivis Canthii Schimperiani pr. Ghinda 

 in Erythr;i'a .\fr. 



3. Dimerium crustaceum (Theiss.) Sacc. ct Trott., Dimerosporium 8436 

 crustaceum Theiss., Broteria (1910) p. 20. — Maculis nigris, ve- 



