442 PLANT DISEASES 



globose or obovate; conidia very numerous, minute, 

 hyaline, continuous, elliptical, at first involved in mucus, 

 5X2-5^. 



Necator, Massee. Sporodochia shieldlike or discoid, 

 slightly convex, orange-red, erumpent, gelatinous, covered 

 by a layer of conidia agglutinated together ; conidia oblong 

 or elliptic, continuous, catenulate, chains at length breaking 

 up, contents orange. 



Necator decretus, Massee, Kew Bulletin, 1898, p. 119. 

 Sporodochia discoid, loosely gregarious, sessile, erumpent, 

 i-i'5 mm. diam., sometimes oblong, 2-2*5 X 1 '5 mm., white, 

 then orange-red ; conidia continuous, ellipsoid, catenulate, 

 14-18x7-8 p.. 



Fusarium, Link. Sporodochium pulvinate or subeffused, 

 often more or less gelatinous when moist ; conidia fusoid 

 or falcate, typically pluriseptate at maturity, acrogenous 

 on branched sporophores. 



Subg. Fusamen. Conidia elongated, continuous. 



Subg. Septosporium. Conidia short, continuous. 



Fusarium solani, Sacc., Mich., ii. p. 296. Globose, 

 irregular, tomentose, whitish ; hyphae branched ; conidia 

 fusiform-falcate, 3-5-septate, 40-60 X 7-8 /*, subhyaline. 



Fusarium lycopersici, Sacc., Mich., ii. p. 296. Hyphae 

 creeping, variously branched, bearing scattered, subsimple 

 sporophores; conidia falcate, ends acute, 25-30X3*5-4 /*, 

 hyaline, then orange. 



Fusarium heterosporum, Rees, Nat. Act. Cur., ix. 

 p. 135. Sporodochium subtremelloid, spreading, deep 

 red ; conidia at first globose then fusiform, 30-35 long, 

 3-septate. 



