516 Pyrenomycetse, Microthyriaceoe, Microthyrium. 



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Secf. 3. Hyalodidymse. 



MICROTHYRIUM Desm. — Syll. II p. 662, IX p. 1066, XI p. 379, 

 XIV p. 687, XVI p. 635, XVII p. 862. 



1. Microthyrium aberrans Speg , Fungi Chilenses (1910) pag. 106, ot)^3 

 cum icon. — Peritheciis hypophyllis sparsis v. perlaxe gregariis, 

 superficialibus dimidiato-scutatis, astomis, atris, glabris, prosenchy- 

 maticis, ambitu areola angustissima subiculigera cinctis, 100-180 



[/.. diam. ; ascis ovatis v. obovatis, apice tunica crassissima umbo- 

 niformi donatis, aparaphysatis, octosporis, 20-25 * 12-15; sporidiis 

 3-4-stichis, hyalinis e cylindraceo oblanceolatis, 1-septatis, parvis, 

 10-11^3. 



Hab. in foliis siccis uon dejectis Lardizabalse biternatoe 

 in silvis prope Cerro Caracol de Concepcion Chile Amer. austr. 



— An cum Asterina labecula Mont. comparanda? 



2. Microthyrium patagonicum Spegazz., An. Mus. Nac. Buenos Aires 6074 

 t. XIX (1909j p. 426. — Peritheciis sgepius hypophyllis, sparsis 



V. laxe gregariis orbicularibus 100-150 a. diam., planiusculis, asto- 

 mis, margine denticulatis obsolete fimbriato-radiantibus; ascis sub- 

 cylindraceis basi breviter crasseque attenuato-pedicellatis, 40-45 « 

 10, octosporis, aparaphysatis ; sporidiis distichis rectis vel leniter 

 curvulis, 15-16 ^ 2,5-3, loculis tequilongis eguttulatis, infero graci- 

 liore, hyalinis. 



Haib. ad folia viva Mayteni magellanicte prope Lago Pa- 

 lomo, Patagonia, Argentina America austr. — Micr. punctiformi 

 (B. et C.) Sacc. cognatum. 



3. Microthyrium eucaiypticola Speg., An. Mus. Nac. Buenos Aires 6076 

 t. XIX (1909) pag. 426. — Peritheciis plus minusve densiuscule 

 gregariis orbicularibus 150 [j.. diam., minute ostiolatis, margine vix 

 denticulatis, membrauaceo-coriaceis, opacis; ascis obclavatis, apice 

 subtruncato-rotundatis, basi abrupte cuneatis brevissime umbonato- 

 pedicellatis, 30-40 «? 8-9. octosporis, aparaphysatis ; sporidiis elli- 

 psoideo-elougatis 1-septatis ad septum non constrictis, 12-14*3, 

 loculis u'qualibus non v. minute 2-guttulatis, hyalinis. 



Hdb. ad folia dejecta subputrescentia Eucalypti globuli 

 in Parque La Plata, Argentina America austr. — M. microscopico 

 Desm. perafiine. 



4. Microthyrium confertum Theiss., Ann. Mycol. VII (1909; p. 352. 6076 



— Myceho aereo nullo; peritheciis epiphyllis, applanato-acutellatis, 



