THE FUNGI WHICH CAUSE PLANT DISEASE 151 



Spores many-celled, filiform 9. Gordonia. 



Ascocarps springing from a more or less 

 developed stroma 

 Spores 8, not sprouting in the ascus. . . 10. Dennatea, p. 152. 

 Spores sprouting in the asci which be- 

 come filled with conidia 11. Tympanis. 



Ascocarps gelatinous when fresh. '. II. Bulgaries. 



Ascocarps sessile or stalked, with smooth, 

 saucer-shaped disc 



Spores 1-celled, round 12. Pulparia. 



Spores I-ceUed, elongate 

 Ascocarps soft, gelatinous inside, ses- 

 sile, thin 13. Bulgariella. 



Ascocarps soft, gelatinous, stalked, 



thick 14. Bulgaria, p. 152. 



Ascocarps watery gelatinous 15. Sarcosoma. 



Spores 2-celled 

 Spores unequally 2-celled rounded 



at the ends 16. Paryphedria. 



Spores elongate, acute at the ends. . 17. Sorokina. 



Spores filiform 18. Holwaya. 



Spores muriform 19. Sarcomyces. 



Ascocarps with convolute tremelliform 

 discs 



Spores I-celled, hyaline 20. Hsematomyces. 



Spores muriform, blackish 21. Hsematomyxa. 



With few exceptions these genera are so far as known sapro- 

 phytes though it is probable that further study will reveal some of 

 them as weak parasites or possibly as destructive ones. 



Cenangium Fries (p. 150) 



Parasitic or saprophytic chiefly in bark, the apothecium de- 

 veloping subepidermally and later breaking through to the surface; 

 sessile, light colored without, dark within; asci cylindric-globoid, 

 8-spored; spores ellipsoid, 1 or rarely 2-celled, hyaline or brown, in 

 one row; paraphyses colored. About seventy species. 



C. abietis (Pers.) Rehm.^^ has caused serious epidemics upon 

 pine in Europe and America. 



Ascoma dark-brown, erumpent, clustered; spores ellipsoid, 

 10-12 X 5-7 fi. 



