814 



.101'KNA L OF THE KOYAL HORTICULTURAL SOCIETY. 



This is a formiilable list, but only one other has occurred in Britain, 

 which answered in external appearance to the above description of 

 Septoria JnulJiami, with the distinction that the conidia, or sporules, were 

 minute (0-7 x2/i); and, as we issued specimens of it under that name, we 

 have since called it Phyllosticta Badhami. [Joum. B.H.S. 1878, p. 93.) 



The other described species of Vine leaf-spot may be briefly enume- 

 rated here, as one or other of them may occur at any time. 



Italian leaf-spot, Phoma Negriana (Thiim.), on living vine-leaves in 

 Italy, has sporules 5-7 x 3-3^ fi. 



Mildew leaf-spot, Phoma succedanea (Pass.), on vine-leaves in company 

 with the mildew, has occurred in Italy w T ith sporules 5 x 2^ fx. 



American mildew leaf-spot, PJioma ampelogena (Sacc), has been 

 found in the United States to follow the American mildew on vine-leaves. 

 Sporules 4 x 3 fx. 



Vine leaf-spot, Phyllosticta vitis (Sacc), found in Italy on living 

 vine-leaves, w T ith sporules 6 x 3 //.. 



Labrusca leaf-spot, Phyllosticta Labruscce (Thiim.), is an American 

 species, which attacks the leaves of the Labrusca grape. The sporules 

 are large, 9-11 x 6-7 /x, on small brown spots. 



Italian Vine leaf-spot, Phyllosticta vitico a (Sacc), appears to be 

 confined to living vine-leaves in Italy. The sporules are 5x2^. 



Leveille's leaf-spot, Phyllosticta Leveillci (Cooke in Joum. B.H.S. 

 1878, p. 92), was described by Leveille (in Ann. Sci. Nat. Bot. 1846, 

 v. p. 279) and specimen preserved in Berkeley Herbarium, with sporules 

 about 10 // long. Known hitherto only in France. 



Carolina vine-spot, Phyllosticta viticola (B. & C), forms large spots on 

 the leaves of Vitis villoma in Carolina. Sporules 8-9 x4ju, 



Ellis's Labrusca leaf-spot, Ascochyta Ellisii (Thiim.), on leaves of 

 Vitis Labrusca, has bicellular sporules 6-8 x5-6 /u. 



Saccardo's leaf-spot, Ascochyta anipclina (Sacc), on vine-leaves in 

 Italy. Sporules two-celled, 10 x 3 /j. 



Curtis's Vine leaf-spot, Sacidium viticola (Cooke, Joum. B.H.S. 

 1878, p. 92). Specimens from North America were distributed under the 

 name of Septoria viticola. Sporules globose, 10 ^. 



Texas melanose, Septoria ampelina (B. k C), on leaves of Vitis 

 vuljn'na, known in Texas and S. Carolina, with sporules 30-50 /< long. 



Small vine leaf-spot, Septoria vinece (Pass.), has occurred in Italy, 

 with sporules 12-18 x lj/i. 



Sorokin's vine-spot, Sjiliaccloma ampclinum (Sorok.), is a Russian 

 species but littl< known. 



Graph Red Spot. 

 Glu'osporium rufomaculans (Berk.), PI. XIII. fig. 3. 



This spot was first recognised on grapes in 1854, and since that 

 time it bus fortunately occurred but rarely, especially as it is one of 

 the kind known as anthracnose, and they are virulent diseases to deal 

 with. 



It forms a rounded spot of a sienna brown colour on the fruit, 



