THE FUNGI WHICH CAUSE PLANT DISEASE 199 



Stroma patellate or effuse 27. Hypocrea, p. 209. 



Stroma erect, simple or branched. . . 28. Podocrea. 

 Cells of the spores not separatmg in the 

 ascus 



Stroma patellate or effuse 29. Hypocreopsis. 



Stroma erect, branched 30. Corallomyces. 



Spores 3 to many-celled 

 Stroma bright or dark colored, not 



conidia-bearing 31. Broomella. 



Stroma dark, green or black, with 

 conidia 



Conidia of two kinds 32. Loculistroma, p. 215. 



Secondary conidia absent 33. Aciculosporium, p. 211. 



Spores muriform 34. Uleomyces. 



Tribe VI. Clavicipiteae (p. 197) 

 Stroma effused 

 Stroma forming a sheath about the host . 35. Epichloe, p. 210. 

 Stroma flat, tuberculate, or disk-shaped 

 Stroma not conidia-bearing 

 Stroma thick, usually light colored. . 36. Hypocrella. 



Stroma thin, black 37. Dothiochloe, p. 210. 



Stroma with the inner portion conidia- 

 bearing 38. Echinodothis, p. 211. 



Stroma erect 



Stroma small, saccate, membranous 39. Oomyces. 



Stroma large, erect, with distinct sterile 



and fertile portions, the latter often 



knob-like 



Stroma formed in the bodies of insects 



and spiders, or in subterranean 



fungi 40. Cordyceps. 



Stroma formed in the inflorescence of 



Glumacea;, etc., spores continuous 



Stroma not growing from a sclero- 



tium 41. Balansia, p. 209. 



Stroma growing from a sclerotium 

 after a period of rest 



Asci preceded by conidia 42. Claviceps, p. 211. 



Asci preceded by smut-like chla- f 43. Ustilaginoidea, p. 213. 

 mydospores \ 44. Ustilaginoidella,p. 114. 



