334 



GREENHOUSE MANAGEMENT. 



The disease is most troublesome when the plants are 

 grown in a poorly drained and over-watered soil, par- 

 ticularly if the stems and leaves form a dense mat at the 

 base. While the fungus is generally confined to the 

 stems and leaves that are upon or close to the damp 

 soil, the effect is sometimes seen upon the upper leaves, 



FIG. 118. ANTHRACNOSE OF THE CARNATION. 



b Spores and bristles. c Spores germinating, 



(a natural size ; b and c greatly magnified.) 



which will have a sickly appearance, and the stems will 

 not develop flowers. 



FAIRY RING SPOT OF CARNATIONS. 



{Heterosporium echinulatum [Berk.] CookeV 



This disease was described and figured in the Gar- 

 dener's Chronicle for 1870 by Mr. Berkeley, but it has 

 only recently been observed in this country. The spores 

 appear in concentric rings that develop centrifugally, 



