232 THE FUNGI WHICH CAUSE PLANT DISEASE 



Sporotrichum fuscum. R. ligniaria (Grev.) Nke. occurs on ash 

 trees. R. echinata Mas. is reported on " all kinds of Dicotyledon- 

 ous shrubs and herbs." 



Melonomma Fcl. in the species M. henriquesianum Bros. & 

 Roum. is parasitic on cacao stems. 



M. glumanun Miy. is on rice.^* 



Ceratostomatacese (p. 222) 



The fungi of this family are very similar to the Sphseriacese, 

 but are distinguished by less pronouncedly carbonous perithe- 

 cia which may be merely membranous, and open by an elongate, 

 beak-like ostiole. It is a family of only about one hundred 

 twenty-five species, chiefly saprophytes. 



Key to Genera of Ceratostomatacese 



Spores 1-celled 



Spores hyaline 1. Ceratostomella, p. 232. 



Spores brown 2. Ceratostoma. 



Spores 2-celled 



Spores hyaline 3. Lentomita. 



Spores dark-colored 



Perithecia on a cottony stroma 4. Rhynchomeliola. 



Perithecia not on a cottony stroma. . . 5. Shynchostoma. 

 Spores many-celled 

 Spores with cross walls only 

 Spores elongate, 4 to many-celled, hya- 

 line or brown 6. Ceratosphseiia. 



Spores filiform, many-celled, usually 

 hyaline 



Perithecia erect, astromatic 7. Ophioceras. 



Perithecia horizontal in stromatic 



^odvles 8. Cyanogpora, p. 233. 



Spores muriform 9. Rhamphoria. 



Ceratostomella Saccardo 



Perithecia superficial, firm; asci ovate, 8-spored, disappearing 

 early; spores elongate, blunt or pointed, 1-celled, hyaline. About 

 thirty species. An extensive study of the genus was made by 



