442 PLANT DISEASES 



globose or obovate ; conidia very numerous, minute, 

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

 5X2'5 fx. 



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 i"5 mm., white, 

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

 14-18 X 7-8 fx. 



Fusarium, Link. — Sporodochium pulvinateor subeffused, 

 often more or less gelatinous when moist ; conidia fusoid 

 or falcate, typically pluriseptate at maturity, acrogenous 

 on branched sporophores. 



Subg. Fiisa7?ien. — 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 /x, subhyaline. 



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

 creeping, variously branched, bearing scattered, subsimple 

 sporophores; conidia falcate, ends acute, 25-30 x 3*5-4 /x, 

 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. 



