62 A SCOMYCE TES 



6. Disc elongate with a thick rim. TRYBLIDIELLA. 

 Disc roundish with a thin rim ; spores 2 -celled. PsEUDOTRYBLlDlUM. 

 Disc roundish with an involute rim ; spores 4-celled. RHYTIDOPEZIZA. 



7. Spores 8, not sprouting in the ascus. DERMATEA. 

 Spores sprouting in the asci which become filled with small conidia. 



TYMPANIS. 



8. Ascocarps sessile or stalked with smooth, saucer-shaped disc. 9. 

 Ascocarps with convolute, tremelliform discs. 12. 



9. Spores I -celled, round. PULPARIA. 

 Spores I -celled, elongate. lo. 

 Spores 2-celled. n. 

 Spores filiform. HOLWAYA. 

 Spores muriform. SARCOMYCES. 



10. Ascocarps soft, gelatinous inside, sessile, thin. BULGARIELLA. 

 Ascocarps soft, gelatinous, stalked, thick. BULGARIA. 

 Ascocarps watery gelatinous. SARCOSOMA. 



11. Spores unequally 2-celled, rounded at the ends (parasitic on algae 



growing on bryophytes). PARYPHEDRIA. 



Spores elongate, acute at the ends (growing on wood). SOROKINA. 



12. Spores I -celled, hyaline. HAEMATOMYCES. 

 Spores muriform, blackish. HAEMATOMYXA. 



Species of Bulgaria are common on oak and chestnut forming 

 top-shaped masses which are soft gelatinous when wet but shrivel 

 into hard dry shapeless knobs. A species of Dermatea is com- 

 mon on stems of Alnus breaking out from underneath the bark. 

 Some of the gelatinous species bear a superficial resemblance to 

 certain of the true tremellines (Tremellales) but can be readily dis- 

 tinguished by the spores in asci. 



LITERATURE. 



Saccardo. Sylloge Fungorum, 8 : 53-646, 768-811 ; 10 : 3-44,. 

 52-67 ; ii : 393-427, 433-435- 



Lindau. Die natiirlichen Pflanzenfamilien, ji : 173-273. 



Rehm. Rabenhorst's Kryptogamen Flora Deutschlands, u. s. 

 w. i3 : 191-1 134. 



Cooke. Mycographia. PI. 1-113. London, 1879. 

 Gillet. Les Champignons. Discomycetes. PI. 1-102. Alencon, 

 1879 ' Suites. PI. 1-35. 1890. 



