4 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



To pick off and burn infected leaves is to help preventing the spread of 



the parasite. 



Sacc. Syll. iii. 118 ; Grevillea, xiii. 72. 



Another species has been detected in Portugal and Algiers (Phyllosticta 

 microsticta, Dur.) with small spots which soon become white, with a 

 distinct dark brown margin. The sporules are even smaller than in the 

 above. 



Aebutus Purple Spot. 

 Septoria uncdonis (Rob.), PI. XVI. fig. 5. 



This is apparently the most common of the Arbutus parasites, and 

 causes small whitish spots upon the leaves, which are circumscribed by a 

 broad purple margin. The receptacles are scattered over the upper 

 surface of the spots, and the sporules are elongated and thread-like 

 (25 x H ri, but without indication of septation. 



It is recorded for France, Portugal, Italy, and Austria, as well as in 

 Britain. 



Sacc. Syll. iii. 26G1, x. G282 ; Cooke, Hdbk. No. 1322. 



A form of leaf-spot has been found in Italy, supposed to be a variety 

 of the above, although that seems to be doubtful, since the sporules are 

 twice as long and distinctly septate (50-80 jj. long). 



Another leaf-spot {Septoria arbuti) has been found in Italy, which 

 much more resembles the above type than the assumed variety, since the 

 sporules are almost the same. 



Akbutus Tuft Mould. 

 Ccrcospora Mollcriana (Wint). 



The only mould which is recorded as attacking the foliage of the Straw- 

 berry tree has occurred in Portugal, but its appearance in any other part 

 of Europe is open to doubt. The spots are normally circular, but often 

 marginal, and pallid grey, with a distinct margin. The mould appears in 

 tufts upon ,the spots, with quite short threads, but the conidia are 

 elongated, slightly curved and attenuated upwards, divided transversely 

 into numerous cells (95 x 3^ fj). Both threads and conidia are tinged 

 olive. 



Sacc. Syll iv. 2269. 



Magnolia Leaf-spot. 

 Phyllosticta Cookei (Sacc), PI. XVI. fig. 4. 



As might be anticipated, the fungus attacks on Magnolia are far 

 more numerous in America than in England, and even those which we do 

 recognise are but seldom to be met with. The one above named, when 

 first found, was called Phyllosticta magnolia, but that name was after- 

 wards found to have been previously appropriated. The pale bleached 

 spots on the leaves are rather large and without any definite margin. The 



