510 FUN(;i IMPERFECTI. 



trees, more rarely the sweet orange and lemon. The disease 

 first appears as whitish or cream-coloured spots on leaves, young 

 twigs, or fruit. If the spots are numerous the leaves become 

 badly curled or twisted, and covered with wart-like eruptions. 



CI. viticolum Ces. is regarded as a dangerous parasite of the 

 vine. 



CI. carpophilum Thum. This species has been found para- 

 sitic on plum and peach in the United States. Its mycelium 

 creeps over the surface of leaves and fruitj causing pale-coloured 

 spots which extend and run together, spoiling the appearance 

 of the fruit. The disease as yet does not appear to have a very 

 wide distribution, nor is it directly very injurious, but as 

 cracking of the ripe fruit occurs when it is present, the way is 

 opened for entrance of fruit-destroying fungi. 



CI. condylonema Pass, also occurs on leaves of the plum. 

 It causes leaf-spot and leaf-curl. The mature conidia have 

 fine spines on their coat. 



CI. fulvum Cooke. (Britain and U.S. America.) This is the 

 cause of a disease of tomato. It attacks leaves and shoots of 

 plants cultivated indoors, and soon causes their death. Prillieux 

 and Delacroix ^ have described a somewhat similar disease in 

 France, found, from artificial infection, to be produced by some 

 species of Cladosporium, but whether this particular species, 

 they did not state. 



CI. cucumerinum Ell. et Arth.- causes a disease of cucumber 

 Frank ^ describes a disease which he found to be due to a 

 Cladosporium {CI. cucumeris n. sp.). This attacked the fruit of 

 both cucumbers and melons in cultivation under glass at Berlin, 

 and caused great damage ; brown rotten depressions appeared 

 on the fruits, and thereon the tufts of conidiophores. 



CI. macrocarpum Preus. causes a " scab " disease of spinach in 

 the Tnited States {KJ. Agric. Exper. Station Bulletin, 70, 1890). 



Other species that may be parasitic are : 



CI. pisi fug. et Mace. On living pods of Pisum sativum in Italy. 

 CI. epiphyllum Mavt. On leaves of Quercus, Platanus, Populus, Hedera, 

 etc. (Biitaiu and U.S. America.) 



CI. juglandinum Cooke. On leaves of the walnut. (Britain.) 



^Bulletin de la hoc. mycolog. de France, 1891. 



2 Description in Mass. Agric. Exper. Station licport, 1892. 



'■'' ZeitHchrift f. Pfianzenkrankheiten, iii., 1893. 



