324 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Orange Sooty Blotch. 



Several kinds of 1 sooty blotch ' are recorded, but it is doubtful if any 

 of them are British. 



The Italian sooty blotch, Meliola Penzigii (Sacc. 1 Fungi Italici,' figs. 

 1132-1135), is found in South Europe, and of this Capnodium citri 

 (Deem.) is possibly a form. 



Sicilian blotch, Meliola citri (B. & P.), is found on Orange leaves in 

 Sicily. 



Australian blotch, Capnodium citricola (McAlp.), occurs on leaves 

 of Orange and Lemon in Australia. (Mass. PL Dis. p. 103.) 



Lemon and Orange Scab. 

 Cladosporium citri (Mass.). 



This mould is developed on the leaves and fruit of Orange and Lemon 

 in a manner analogous to the scab on Apples (Fusicladium), and is very 

 injurious to Orange trees in Florida and Louisiana. (Mass. PI. Dis. 

 p. 310.) 



Another and similar mould attacks Orange leaves in Italy. This is 



Cladosporium clcgans (Penz.). 



The ' foot-rot ' of Orange and Lemon trees, in South Europe and the 

 United States, is attributed to Fusarium limonis (Briosi). 



Orange Anthracnose. 

 Glocosporium Hendersonii (B. & Br.). PI. XIV. fig. 14. 



This parasite of cultivated Oranges was described by Berkeley some 

 years ago, but does not appear to be common. It occurs on the under 

 Burfaoe of the leaves, and the pustules are scattered without forming any 

 definite spots. 



The conidia, which are produced in the pustules, are oblong (12^-15 n 

 long), and the mass, when extruded through the ruptured cuticle, is 

 slightly coloured. 



B. d Br. . I nn. N. II. No. 1702 ; Sacc. Syll. iii. 3673 ; Grcvillea, vi. 126. 



There are seven or eight other species of Anthracnose which attack 

 Orange Leaves, especially in the South of Europe, but they are not re- 

 corded as British, and leaf-spots, of several genera, almost too numerous 

 to mention, but our interest in Orange culture is comparatively small. 



One Italian leaf-spot, Sphcerella Gibclliana (Pass.), develops asci and 

 Bporidia on living Orange leaves. 



( )i; ange-leaf Anthracnose. 



s ' m ;i1 I" r '' • of Anthracnose have been recorded as attacking the 

 folm^i o! i ►range and Lemon trees in conservatories. 



(ihmsjmnum lie spar idcarum forms large bleached spots on the leaves, 

 " n u'l'i'-b ''" pustules are gregarious and numerous. The conidia are 



