PHACIDIACEl. 379 



OiiDER 25. PHACIDIACEL 

 Receptacle more or less coriaceous or carbonaceous. Disc at 

 length exposed by the regular or irregular fissure of the outer 

 coat. 



275. PHACIDIUM, Fr. 

 Perithecium bursting irregularly in the centre, by valvular 

 teeth. 



1. Pini, Schm. On piuc-brandies. 



2. carbonaceum, Fr. Oil willow. 



3. Vaccinii, Fr. On Voce. Vitis-idcea. 



4. coronatuiii, Fr. {no. 58). On dead oak-leaves. 



5. deutatum, Fr. On dead oak-leaves. 



G. llubi, Fr. {no. 586). On dead bramble-stems. 

 7. repandum, Fr. On various living herbs. 



276. HETEROSPH^RIA, Grev. 

 Perithecium globoso-depressed, thin, black, at length open 

 above and irregularly torn. Disc thick, placentceform. 

 1. patella, Grev. t. 103. On dead herbaceous stems. 



277. RHYTISMA, Fr. 



Perithecia forming a confluent mass, opening by flexuous 

 fissures. 



1. maximum, Fr. ; Sow. t. 356. On willow. 



2. AndromediB, Fr. On Andromeda pol'ifoUa. 



3. salicinmn, Fr. ; Grev. t. 118./. 2. On willow-leaves. 



4. acerinum, Fr ; Grev. t. 118./. 1. On sycamore- and mnple-leaves. 



5. punctatmn, Fr. On sycamore-leaves. 



6. Urtica), Fr. On dead nettle-stems. 



278. TRIBLIDIUM, Beb. 

 Perithecium labiate, splitting from the centre towards tbe 

 circumference. 



