FUNGOID PESTS OF CULTIVATED PLANTS. 169 



receptacle. Conidia oblong, rounded at the ends (12-16 x 4-5 p), and 

 colourless. 



No experiments were tried, but possibly dilute spraying might be 

 advantageous. 



Journ. Bot. 1886, p. 134 ; Sacc. Syll. x. 5049. 



DRAC^NA LEAF-SPOT. 

 Phyllosticta Draconis (B. & W.), PL XV. fig. 25. 



The original occurrence of what appears to be the same pest was in 

 Portugal, many years ago, on the leaves of Draccena Draco, but the 

 specimens then collected were immature and deficient in fruit ; the 

 external habits of the two appear to be the same. 



The present specimens occurred on the leaves of Draccena terminalis 

 and Draccena Cooperi in conservatories, and at present the species seems 

 to be restricted in range and influence. 



The spots occur on both surfaces of the leaves, are pallid and very 

 irregular in form, with a distinct purple border. The little black points 

 scattered over the spots indicate the minute spherical receptacles which 

 are seated within the substance of the leaf, and are covered by the thin 

 cuticle, through which they are scarcely visible to the naked eye. 



The sporules are profuse, minute, elliptical, and quite colourless, 

 escaping when mature by a pore at the apex of the receptacle (7 x 3 ju). 



Generally the fading or sickly-looking leaves are those which are 

 attacked. 



Sacc. Syll. iii. 334 ; Grevillea, xix. p. 8. 



ANTHBACNOSE. 

 Glc&osporiurri draccenicolum (B. & Br.). 



This species was first described by Berkeley and Broome under the 

 name of Myxosporium draccenicolum as a destructive pest on the leaves 

 of Draccena. The description is so imperfect that it would be difficult 

 to identify, but it is said to be orange, and to have conidia which are 

 ovate (9x6 /*). 



At present it would appear to have been found in Britain upon 

 cultivated Draccena. 



Berk. & Br., Ann. Nat. Hist. 1881 ; Sacc. Syll. iii. 3805. 



No genuine fungoid disease has yet been detected in this country on 

 the leaves of Aspidistra, although discoloured spots are not infrequent. 

 One species, Septoria transversalis (Sacc.), is reported to occur in South 

 Europe. 



CALADIUM MOULD. 

 Monilia pruinosa (C. & M.), PL XV. fig. 26. 



This mould was first discovered on the fading leaves of a species of 

 Caladium, but whether it was the cause of the fading was not ascertained. 

 It formed a broadly effused thin white stratum, as if the leaf were covered 



