124 Bulletin 313 



Heterosporium gracile (Wal.) Sacc. — On leaves of Iris sp. and 

 Hemerocalli<; fulva and other monocotyledons. Causes elliptical, 

 light brown spots with brow^n or purple borders. Conodiophores 

 brown to olive green, septate, nodulose, 70-170 x 9-11 fi; conidia 

 cylindrical, echinulate, brown to olive-green, 1-3 septate, 30-80 x 

 13-23 fx. 



752- Infected part of Iris leaf. 753. Immature coniodiophores, 1/12. 754. 

 Mature conidiophores, 1/12. 755. Tip of conidiophores, 1/12. 756. Conidia, 

 1/12. 



Spondylocladium atrovirens. Harz. — On the tubers of the po- 

 tato. Causes blackish or olive-colored, slightly depressed spots 

 about 2-3 cm. in diameter, followed by a dry rot. Conidiophores 

 solitary or in cluster, septate but not constricted, olive or brownish ; 

 conidia elongate, ovate, apex narrow, walls thick, 5-9 septate, may or 

 may not be constricted, same color as conidiophores, 30-50 x 6-13.3 



757. Section of potato showinp conidiophores and conidia on surface, 2/3. 

 758. Conidiophore and conidia, 1/6. 759. Conidiophore, 1/6, 1/12. 760. Coni 

 dia, 1/12. 761- Germinating spores, 1/6, 1/12. 



