6 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Laurustinus Leaf-spot. 

 Pkyllosticta tinea (Sacc), PI. XVI. fig. 6. 



The spots are formed on the upper surface of Laurustinus leaves, and 

 are either roundish or irregular, and bleached, becoming whitish. The 

 receptacles are dot-like and flattened, scattered over the surface. The 

 sporules are minute and oblong (4—5x1 fx). 



Except in Britain this parasite is only recorded for Italy, where it 

 was first discovered. 



Sacc. Syll. iii. 75. 



Another spot (Pkyllosticta tineola) of a similar kind is known to 

 occur on leaves of Laurustinus in France. The spots are vague and 

 ochraceous, but the sporules are cylindrical, and very much larger 

 (15x3 fi). 



A third species has also been recorded in France (Pkyllosticta 

 Boumcgucrii), with grey indefinite spots, and medium-sized sporules 

 (7-8x3^). 



Piuvet Leaf- spot. 

 Pkyllosticta ligustri (Sacc), PL XVI. fig. 7. 



Although Privet has the reputation of suffering from the attacks of at 

 least a dozen different species of fungi, it is seldom that it is a victim 

 in this country, escaping both cluster- cups and rust, for occasional leaf- 

 spots. 



The above common species has variable spots which are soon pale and 

 encircled by a tawny margin. The receptacles are dot-like and minute, 

 and the sporules are narrow, rounded at the ends, with two nuclei 

 (6-8 x 3 p). 



It has occurred in Italy and Portugal. 



Sacc. Syll iii. 107 ; Grevillea, xiii. 72. 



The most probable other form of leaf-spot is caused by Septoria 

 ligustri, but that has not hitherto been recorded for Britain, although 

 known in France and Belgium. Similar spots have been found upon 

 leaves in this country, but sporules have never been discovered. 



The Privet cluster-cup, Mci&ium ligustri (Str.), has only been found 

 in Germany, and a Uredo has also been observed in the same country. 



Box' Leaf White Spot. 

 Pkyllosticta limbalis (Pers.), PI. XVI. fig. 8. 



The only leaf- spot on the common Box is itself not so very common, 

 although conspicuous. There may be some half-dozen other kinds of 

 leaf-spot, at one time or other described, on so widespread a plant, but 

 they are not British, and the present one is rather a curiosity than 

 a pest. 



