440 PLANT DISEASES 



surface of the leaf; conidiophores, springing from a small 

 stroma, 100-200x8-10 //, olive, septate, nodulose; conidia 

 terminal or lateral near the apex of the conidiophores, 

 olive, minutely warted, 2-5 septate, cylindrical, constricted 

 at the septa, 30-50 x 10-15 /^. 



Heterosporium gracile, Sacc, SylL, iv., No. 2308. — Form- 

 ing rather large, elliptical, or roundish brown spots bounded 

 by a darker line ; conidiophores septate, nodulose, olive, 

 70-90 X 10-14 /x; conidia elliptic-oblong, 1-3-septate, obtuse 

 at the ends, minutely warted or granular, pale olive, 35- 

 70 X 14-20 /A. 



On living leaves of species of Iris, Freesia, Antholyza, 

 and Hei7ierocellis. 



Distr. — Europe, Cape of Good Hope, New Zealand, 

 United States. 



Macrosporium, Fries. — Conidiophores subfasciculate, 

 softish, erect or ascending, subsimple or branched, coloured, 

 bearing at or near the apex oblong or clavate, muriform, 

 coloured conidia. 



Some are known to be, and others are suspected of 

 being, conidial forms of ascigerous fungi. 



Macrosporium nobile, Vize, Grev. — Conidiophores fas- 

 ciculate, short, erect, septate, brown, simple ; conidia 

 subpiriform or irregular, 4-10 septate, muriform, constricted 

 at the septa, brown, 60-80X40 /x. 



Macrosporium tomato, Cke., Rav. Amer. Fung. Fxs., No. 

 603. — Spots orbicular, black; hyphae short, robust, flexuous, 

 septate ; conidia clavate, apex slightly narrowed, scarcely 

 stipitate, parenchymatous, brown, 100-120X20-22 /x. 



Macrosporium solani, Ellis and Mart., Amer. Nat., 1892^ 



