FUNGOID PESTS OF CULTIVATED PLANTS. 31 



It has been recorded in France, where it was first discovered, and 

 afterwards in Italy and Great Britain. 

 Sacc. Syll. iii. 2804 ; x. 6318. 



Another species, with round pale spots, margined by a narrow bright 

 brown ring (Septoria noctiflorce), occurs on Silene noctiflora in America. 



One species without any definite spots (Septoria dianthicola) attacks 

 the leaves of Sweet Williams and Pinks in Italy and Portugal. 



Another affects the leaves of Saponaria (Septoria Saponarm) in 

 France, Italy, and Germany, in which the spots are pallid and rounded or 

 irregular, the sporules being more robust than usual. 



The leaf -spot most prevalent in Europe, S. Africa, and Australia 

 (Septoria Dianthi) is not recorded for Britain. (See JOURNAL B.H.S. 

 1902, PI. I., f. 3.) 



LARGE DIANTHUS SPOT. 

 Septoria Sinarum (Speg.), PI. II. fig. 31. 



This leaf-spot seems hitherto to have been confined to the leaves of 

 Dianthus sinensis, which are blotched with large and somewhat rounded 

 whitish spots, often occupying the greater part of the leaf, and without 

 any definite margin. The receptacles are scattered over the upper surface 

 of the spots. 



The sporules are of the threadlike type, but very short for fungi of 

 this kind (20-25 x 2-2^). 



The species was first found in Italy, but has since migrated to 

 Britain. 



Sacc. Syll. iii. 2802. 



We may just mention Septoria dianthophila which affects the stems 

 of Dianthus Caryophyllus in Brazil. 



Two species are recorded as selecting specially the calyces of 

 Dianthus for their host. One of these is named Septoria Carthu- 

 sianorum, and occurs in Belgium ; whilst the other is called Septoria 

 calycina, and is given as Belgian also ; but except in the names we fail 

 to detect any difference between them, and suspect that it is the same 

 parasite described independently by two different persons. 



CARNATION ANTHRACNOSE. 

 Grlceosporium Dianthi (Cooke). 



During the spring of 1902 Carnations in several localities were 

 attacked by this pest before it could be found in fructification and 

 described, as it would appear to be an entirely new pest. 



The leaves are at first spotted with small purple roundish spots. 

 These gradually enlarge and become confluent and indeterminate, and at 

 length brownish in the centre. Meanwhile the leaves become sickly, and 

 commence to die off at the tips. The pustules are not to be distinguished 

 by the naked eye, and scarcely by the aid of a lens. Cells beneath the 

 cuticle supply the place of definite receptacles, and in them a large 

 number of elliptical hyaline sporules (10-12 x 5 p) are produced, which 



