68 



FUNGOID PESTS OF CULTIVATED PLANTS. 



spots, caused by the dark threads and mycelium of this mould, and soon 

 decay. 



The threads grow in tufts, and are long and flexuous, with thin walls, 

 pale brown, septate, and occasionally branched, bearing at their apex the 

 conidia of variable size and form, some being elliptical and continuous, 

 others two-celled and longer, whilst others are cylindrical, with rounded 

 ends and two or three divisions (30-80 x 10 JJL), externally rough with 

 minute points and slightly coloured. 



When mature these conidia will germinate freely from [every joint. 



Spraying with potassium sulphide is stated to check the disease. To 

 prevent spreading, diseased leaves should be burnt. 



Sacc. Syll iv. 2806 ; Cooke Journ. Q.M.C. 1877, t. 25, f. 13 ; Gard. 

 Chron. June 1877, fig. 163 ; Grevillea, v. 123. 



FIG. 9. UROMYCES EBYTHRONII. 1. Portion of a leaf showing clusters of the 

 fungus. Nat. size. 2. A single group of the fungus fruit known popularly as 

 " cluster-cups " : x 100. 3. Uredo, or summer- spores : x 400. Teleuto- or 

 winter-spore : x 400. 



SQUILL BRAND. 



Uromyces Scillarum (Grev.), PI. V. fig. 86. 



This parasite is very common on the leaves of the Wild Hyacinth, 

 and probably has thence found its way into gardens, where it attacks 

 the leaves of Muscari botryoides and other species. 



The attacked leaves are blotched with paler spots, upon which the 



