478 FUNGI IMPERFKCTI. 



dirty white or brownish colour with a darker margin. The 

 pyenidia appear as black points on the spots, and rupture the 

 epidermis before giving off their septate spores. 



S. anemones Desm. On Anemone. (Britain.) 



S. lychnidis Desm. On Lychnis diurna. (Britain.) 



S. epilobii West. Ou Epilobium. (Britain.) 



S. stachydis D. et E. On Stachys. (Britain.) 



S. urticae D. et E. On Urtica dioica. (Britain.) 



S. cyclaminis Dur. et Mont. This produces roundish spots -with 

 concentric markings on the leaves of Cyclamen which then gradually 

 ■wither. 



S. chrysanthemi Cav. causes a leaf-spot on Chrysanthemiim japonicum. and 

 C. indicum. 



S. exotica Speg. attacks cultivated New Zealand species of Veronica. 



S. hydrangeae Bizz. causes injury to cultivated Hydrangea. 



S. sedi West, injures Sedum under cultivation in the United States 

 and Britain. 



Other species on many other herbs in Britain and America. 



Many species of Septoria have been recorded on trees and 

 .shrubs, e.g.: 



S. rosae Desm. On roses. (Britain.) 



S. hederae West. On ivy. (Britain.) 



S. fraxini Desm. On the ash. (Britain.) 



S. nigro-maculans Thum. On green walnuts, stunting their growth. 



S. castaneae Lev. On the sweet chestnut. 



S. aesculi (Lib.). On the horse chestnut. (Britain.) 



S. pseudoplatani Eob. et Desra. On leaves of sycamore. 



S. populi Desm. On leaves of poplar. 



S. didyma Fuck. On Salix triandra and S. alba. 



S. comicola Desm. On leaves of Cornus sanguinea. 



Phleospora. 



True pyenidia are not formed, but the conidia are abjointed 

 from cavities in the stroma ; they are hyaline, rod- or spindle- 

 shaped, and consist of two or more cells. 



Phleospora aceris (Lib.). On living leaves of Acer Pseudoplatanus. 

 (Britain.) 



Phi. mori (Lev.). On living mulberry leaves ; probably related to 

 Sphaerella mori. (Britain.) 



Phi. ulmi (Fr.). On living leaves of elm. (Britain and America.) 



Phi. oxyacanthae (K. et S.). On living leaves of Crataegxis Oxyacantha. 

 (Britain.) 



