THE FUNGI WHICH CAUSE PLANT DISEASE 



193 



Fcl. on Tilia; C. citri B. & P. on leaves of citrus fruits in Europe 

 and America. 



C. stellatum Bern, and C. guajavse Bern, cause sooty mold 

 on various trees in the tropics; ^^' C. corticolum McAlp. on citrous 

 trees in New South Wales ''* and Australia; C. javanicum Zimm., 

 on coffee.''* C. meridionale Amaud is on Oleander, oak, and 

 olive, in Europe; '*" C. olea Arnaud '*^ on olive in France. 



Limacinia tangensis P. Henn. is on the mango and cocoanut in 

 Africa. 



Pleomeliola hyphaenes P. Henn. is on leaves of Hyphsene in 

 Africa. 



Meliola Fries (p. 190) 



Perithecia globose, surrounded by dichotomously branched 

 hyphae which resemble the appendages of the Erysiphaceae; asci 

 short, broad, 2 to 8-spored; 

 spores oblong, 2 to 5-septate, 

 rarely muriform; paraphyses 

 none. 



This is a genus of over one 

 hundred thirty species, whose 

 mycelium grows superficially 

 upon leaves and twigs. 



M. camelliae (Catt.) Sacc. oc- 

 curs on Camellia. 



Mycelium, copious, black, 

 bearing various sporing bodies; 

 perithecia black, spherical, 80- 

 150 H; containing several 8- 

 spored asci; spores 16-18 x 45 ix, 

 olivaceous, 4-celled. Stylo- 

 spores ovoid, 5 fi, hyaline, borne 

 in flask-shaped pycnidia which 

 may be as much as 1 or 2 mm. 

 high; pycnidia globose resem- 

 bling the perithecia but smaller, 

 containing spherical spores of about the same size as the stylo- 

 spores. Chlamydospores are also formed by the breaking up of 



Fig 



140. — M. camellisB. 3, pycnidium 

 and spores. 4, other fonu of pyc- 

 nidium. 5, perithecium, ascus and aa- 

 cospores. ^ter Webber. 



