Hysteriacefe, Hyalopliragmine, Diehaena. 771 



OICH/ENA Fr. Summa Veg. Scand. p. 403.(Etym. dicha, divisim, ob 

 perithecia sulco divisa). — Perithecia typice biogena, innato-erum- 

 pentia, irregulariter elliptica, coriaceo-membranacea, atra rima 

 longitudinali notata, ssepius in raaculam atrara dense aggregata. 

 Asci elongati, 4-8-spori. Sporidia oblongo-fusoidea, 2-pluriseptata, 

 typice 3-septata, subhyalina. — Status pycnidicus, ascophoro fre- 

 quentior, sistit Psilosporce Rabenh. species. 



1. Dichaena quercina (Pers.) Fr. Elench. II, 141, Opegrapha querci- 573« 

 na Pers. 0. macularis Ach. Sckizoderma qitercinum Chev. Par. 



p. 438, t. 11, f. 21, Helerographa macularis Fee. — Peritheciis 

 e cortice vivo erumpentibus minoribus subimmersis ovatis, demurn 

 in tnaculas lseviusculas subdeterminatas confluentibus ; ascis cito 

 diffluentibus, oligosporis (?); sporidiis distichis, oblongo-ovoideis, 

 20-25 »9, diu granulosis, continuis, tandem tenuiter 3-septafcis, 

 hyalinis. 



Hab. ad cortices Jeviores Quercus in tota Europa et Ame- 

 rica boreali. In Cyrilhe et Vaccinii corticibus in Amer. bor. 

 adsunt formse similes. 



2. DichaBna faginea (Pers.) Fr. Elench. II, 141, Opegrapha conglo- 5737 

 merata Pers., Opegr. faginea Pers., Opegr. epiphega Ach. — 

 Peritheciis e cortice vivo erumpentibus, majoribus, prorninulis ob- 

 longis, demum in maculas rugosas elTusas confluentibus. 



Ilab. ad cortices leviores vivos Fagi in tota fero Europa et 

 Amer. bor. — Var. corylea Fr. 1. c. Peritheciis minoribus pro- 

 minulis subrotundis, demum in maculas fcuberculosas confluentibus. 

 ln cortico Corvli in Germania, Suecia etc. 



3. Dichaena strobilina Fr. Summa Veg. Scand. p. 40, Cooke Handb. 573-s 

 n. 2805. — Peritheciis gregariis erurapentibus, subirregularibus, 

 initio subrotundis, molliusculis, opace brunneis, dei nigris, rima 

 longitudinali dehiscentibus; ascis suboctosporis; sporidiis fusoideis 

 leniter curvis, triseptatis subinde 3-nucleatis, hyalinis, 10-13 -. 

 Jongis. — Pycnidium sistit Hendersoniam (Psilosporam %) slrobi- 

 linam Curr.: stylosporis fusoideis, hyaliuis, binucleatis. 



llab. iu squamis conorum Abietum in Suecia, 13ritannia et 

 (ierraania. 



4. Dichaena strumosa Fr. Nov. Symb. p. 132. — Peritheciis oblon- 5739 

 go-subrotundis, dense stipatis demum corrugatia concrescentibus, 



in stromate corticali hemisphaerico protuberante innatis. 



Ilab. ad ramos Quercuum in Mexico (Liebmanh), Quercus 



