STUDIES OF DISEASE PRODUCING SPECIES OE FUSARIUM. 223 



F XVII. Fusarium from yellow dent corn. Isolated from decay- 



ing ear of corn sent from Indiana. January, 1911. 



F XVIII. F. roseum Lk.* Isolated from diseased wheat which 



was secured from Dr. Thomas Manns then of the Ohio 

 Experiment Station. 



F XIX. Fusarium isolated from decaying cucumber. This fungus 



differs from F VII in that the mycelium remains 

 white in old cultures while in F VII it takes on some 

 purple color on certain media. 



F XX. Fusarium isolated from cucumber by Dr. W. J. Morse. 



Grows slowly and produces less aerial mycelium than 

 XIX. Shows some blue color in old cultures. Spores 

 are mostly 3-septate. 



F XXI. Fusarium from tomato. Isolated from decaying tomato. 



Similar in cultural characters to F XIX. 



F XXII. Fusarium from tomato. This strain seems to be iden- 



tical with F XXI. 



F XXIII. Fusarium from squash. Isolated from decaying squash. 



Very similar in cultural characters to F XXI. 



F XXIV. Fungus isolated from June grass which showed silver 



top June, igii. This fungus is identical in cultural 

 characters with the one which Stewart isolated from 

 June grass and which he regarded as identical with 

 the carnation bud-rot fungus. 



F XXV. Fungus isolated from red top which showed silver top, 



1911. Identical with F XXIV. 



F XXVI. Fungus isolated from quack grass, 1911. 



F XXVII. Fungus isolated from fowl meadow grass, 191 1. 



F XXVIII. Fungus isolated from timothy from Maine, July, 1911. 



F XXIX. Fusarium from timothy from Indiana, 1911. This is a 



typical species of Fusarium and does not show the 

 obovate spores. 



F XXX. Fungus with obovate spores from timothy which showed 



silver top. From same lot of material as F XXIX. 

 F XXX is identical in cultural characters with the 

 forms isolated from the different grasses in Maine. 



F XXXI. Fusarium isolated from summer squash, July, 1911. This 



fungus produces a small proportion of obovate spores 

 in cultures. 



F XXXII. Fusarium isolated from diseased stem of garden pea, 



July, 1911. 

 F XXXIII. Fusarium in which the mycelium takes on a blue color. 

 Isolated from potatoes in storage, 191 1. 



* See foot-note p. 254. 



