625 



ram. 3. lieptostroinacfse Sacc. 

 Dimidialo-sculalui Succ. Mich. IL p. 8. 



Perithecia [ilus v. miiuis distincte dimidiata, scatiformia, astoma 

 V. ostiolata v. hysterioideo-rimosa, membranacea v. carbonacea, atra, 

 ■erurapentia v. superficialia. 



Clavis analytica generum. 



Sect. 1. llyalospor» Sacc. 



Sporul* gIobos£e v. ellipsoideaj v. oblongse, continuse, hyalinse. 



I. Peritliecii contextus distiaete pafenchyrnaticus. 



A) Perithecia astoma v. varie hiantia, sed non longitudinaliter rimosa. 

 Leplothi/rium. Perithecia depresso-clypeata , plerumque facile secedontia ; 



basidia obsoleta. 

 Pigootia. Perithecia irregularla, depressa, non secedeutia, saepe stellatim di- 



gesta; basidia columnaria. 

 Melasmia. Perithccia irregularia, depressa, stromate phyllogcno atro innata; 



basidia obsol-eta. 

 Actinolhccium. 1'erithecia clypeata et stellatim riinosa. saepe vero in radios hy- 



steriirormes, lanceolatos, yulcatos divisa; bttsidia 'obsoleta (Transit ad B]. 



B) Perithecia distincte v. obsolete longiCudinaliter rimosa, subhyste- 



rioidea. ^ 

 Leplostroma. Perithecia lanceolata v. elongata, saepe demum secedentia, sub- 



carbonacea. (llurium specierum rruetihcatio latet). 

 Labrella. Perithecia subciicularia, non secedentia, saepe spuria. 



II. Perithecii contextus subanliistus, puuctulatus (non vere cellulosus). 

 Sacidium. Perithecia clyi»eata; sporulse globos&i, ellipsoideie v. oblongae (Plu- 



res species, ignoto contextu, Ibrte ad Leptoltiyrium ducendte). 



Sect. 2. PhaBosporie Sacc. 



Sporula? globulosse v. ellipsoideae, continua^, fusca'. 

 Pirostoma. Perithecia scutirormia, centro umbilicato-pertush. 



Sect. o. Phragmosporje Saec. 



Sporula? oblongae, hyalin.T, 2-pluriseptata3 v. d-loculares, loculis 

 subcruciatim positis. 



Discosia. Sporulse fusoidea?, 2-pUiriseptatie, utrinque 1-ciIiatae. 

 Entomosporium. Sporula^ cruciato-tetrameree, ioculis omnibus l-ciiiatis. 



40 



