FUNGOID PESTS OF CULTIVATED PLANTS. 



47 



The sporules are long and thread-like, mostly curved, and contain a 

 row of little nuclei (35-40 x H/<)> and the spots are traversed by the 

 mycelium. 



It is generally thought that in these leaf-spot diseases spraying with 

 Bordeaux mixture may be of service. At any rate the spread of the 

 disease may be checked by persistently destroying diseased leaves. 



Sacc. Syll hi. 2782 ; Grcvillca, xiv. 101. 



B 



Fi«. 6. — Endophyllum Sempervivi, attacking Sempervivum monticolum. 

 A, Entire plant ; B, C, Leaves. (Gardeners' Chronicle.) 



Although the above is the only parasite upon Oenothera which has yet 

 appeared in this country, there are other species known, especially in 

 North America, such as JEcidium Peckii, and JEcidiiim Oenothera, Puc- 

 cinia CEnotherce, and Pucciniastrum (Enothcrce, Uromyces (Enotherce and 

 Uromyces plumbarius, in addition to a rot-mould, or Peronospora. As 

 these have not crossed the Atlantic, a favourite cottage flower flourishes 

 with us comparatively unharmed. 



