204 FUNGOID PFSTS OF CULTIVATED PLANT-. 



The same remarks apply to this species as to Ghvosporium nerviscquum. 

 Known also in France, Belgium, Holland, and Italy. 

 s c. Syll. iii. 3717 ; Grcvillca, xiv. p. 124, No. 617. 



Two or three ordinary kinds of leaf-spot, caused hy Phyllosticta or 

 Scptoria, on Plane leaves have been recorded, but not yet as British. 



House Chestnut Leaf-spots. 



Scptoria llippocastani (B. & Br.), PI. XIX. fig. 10. 



Common enough on the living leaves of Horse Chestnut in Britain, 

 but scarcely recognised elsewhere except in Italy. 



The spots are at first minute and scattered, then becoming confluent, 

 and forming broad rufous patches. Receptacles dot-like and scattered, 

 sporules, long, rod-like, curved and flexuous with divisions (55-60 x 3 /<) 

 ejected in thin, delicate, pale tendrils. 



Presumably the Horse Chestnut trees are not much injured by this 

 leaf-spot, and we know of no remedies which have been applied. 



Sacc. SyU. iii. 2578; Berk. A.N.H. No. 434; Cooke, Hdbk. No. 1305. 



House Chestnut Stekeum. 

 Stereum purptirewn (Fries), PI. XIX. fig. 11. 



1 trees have been destroyed in Greenwich Park, the trunks of 

 whieli have borni this Stereum, and it has been contended that this fungus 



i ut< r< '1 as a wound parasite and destroyed the tries. This should be 

 confirmed by experiment, as the same fungus has been credited with 

 causing " silver leaf " in stone-fruit trees. 



Sacc. SyU. vi. 72N4 ; Cooke, Hdbk. No. 910 ; Mass. Fun. Fl. i. 132, 

 fig. 14 ; Joum. 11. U.S. xxviii. p. xxii (1903). 



A leaf- j < it [Phyllosticta Pavia Desm.) has been found occasionally in 

 this country on the leaves of .Esculus indica syn. Pa/via indica. The 

 sporules are cylindrically elliptical, biguttulate (11-12 /< long). 



Known also in Prance and Belgium. 



Sacc. SyU. iii. 2 ; Qrevillca, xiv. p. 71, No. 366. 



Elm-le \i PhlceobpokEj 

 Phleospora Ulrni {Ft.), PI. XIX. fig. 12. 



One of the oommonesl parasites on leaves of the Elm, sometimes 

 occupying nearly i \< ry leaf on a nee. The spots are small and brownish 

 on the under surface, over which the pustules are scattered. The oonidia 



an- profuse, Cylindrical, rouin led at the ends, at first nucleate, ami then 



divided into five cells (65x6 /i), exuding from il ifice of the pustule in 



whitish tendrils, and diffusing themselves over the surface of the leaf. 



Known in older hooks under the name of Septoria I' Inn, and supposed to 



be an earlj or condition, of Phyllaohora Ubnu 



