FUNGOID PESTS OF CULTIVATED PLANTS. 63 



hothouse plants. Hence Orchids and other exotics will find no mention 

 here. 



Lily Leaf-spots. 



Fortunately Lily leaf-spot has not been detected in this country, but 

 it is not uncommon abroad. 



One species (Plvjllosticta Lilii) has pallid spots with a broad rufous 

 margin and small pale brownish sporules (4-5 x3 /u) on Lilium sicperbum 

 in Canada. 



Another (Phyllosticta liliicola) has no definite spots, but the receptacles 

 are scattered, and the sporules are larger (10 x 3 fi). It is found on Lilium 

 candidum in Italy. 



In another species on Martagon Lily (Cijlindrosporium incouspicuum) 

 there are irregular and indefinite brown spots, and the sporules are long 

 and threadlike (60-100 x 3^ /j), with from three to five transverse 

 divisions. At present confined to Switzerland. 



Lily Cluster-cups, PI. V. fig. 81. 

 The cluster-cups of the Lily of the Valley (Mci&iwm Convcdlarice) are 

 credited with attacking the leaves of Lilium canadense in Belgium and 

 the United States. 



Another species {/Ec id iumSafianoffianum) occurs on leaves of Martagon 

 Lily in Siberia. 



These are named incidentally, as some one of them may at any time 

 pay a visit to our shores. 



Lily Brand. 



Puccinia Liliacearum (Duby), PI. V. fig. 84. 



A disease which affects indiscriminately a large number of Liliaceous 

 plants, but fortunately not common in this country, and never recognised 

 until within the last few years, it having been found chiefly upon Ornitho- 

 galum. It forms unsightly pustules on the leaves, enclosing the very 

 dark, almost black, teleutospores. 



There is said to be an JEcidium which is the prelude to this brand ; 

 but it has not been seen in Britain. 



The pustules are grouped together, and are for a long time covered by 

 the cuticle, which is at length ruptured longitudinally. The teleutospores 

 are oblong, divided in the middle, and a little attenuated towards each 

 end, of a comparatively large size (40-70 x 22-35 ^), dark brown, and 

 externally smooth, on rather long deciduous pedicels. 



It is known in France, Germany, Austria, Italy, as well as in Great 

 Britain. 



Should this pest make its appearance all the affected leaves should be 

 stripped off and burnt, so as to destroy the teleutospores and prevent the 

 spread of the disease to other plants. 



Sacc. Syll. vii. 2314 ; Gard. Chron. July 28, 1888, fig. 2 ; Plowr. Brit. 



Ured. 196. 



Lily Simple Brands. 



Uromyces sp. 

 These, which we call simple brands, have a similar life-history to the 

 two-celled brands of the genus Puccinia, but the teleutospores have only 



