676 MEDICAL MYCOLOGY 



I have hesitated to place this species in PulluJaria but it apparently has 

 blastospores as well as chlamydospores. From its soni'ce, one would expect 

 it to be related rather with MadnreUa. 



DEMATIUM 



Dematium Persoon, Neues Mag. Bot. 1 : 121, 1794. 



Montoyella Castellani & Chalmers, Man. Trop. Med. ed. 2, 799, 1913. 



The type species is Dematium articulatum Persoon, isolated from Allium 

 (Fig. 108). 



Hyphae hyaline, septate, branched, bearing chains of smooth, black arthro- 

 spores on lateral branches (Fig. 109). 



The species are predominantly parasitic or saprophytic on plants. The 

 pathogenic species referred here have not been very carefully described, and 

 their reference here is somewhat doubtful. On the other hand, there is nothing 

 in their descriptions to warrant placing them in Cladosporium which has two- 



Fig-. 108. — Demntiuni articulatum Pers. (Torula Allii Sacc.) type of the ffenus Dematium. 



(After Lindau 1906.) 



celled arthrospores. It is to be hoped that some one will undertake a careful 

 study of the morphology of the whole group with black arthrospores. These 

 species seem to produce relatively superficial lesions on the skin. 



Dematium Wernecki (Parreiras Horta) Dodge, n. comb. 



Carats noir Montoya y Florez, Recherches sur les carates de Colombie, 

 These Med. Paris 25: 48, 49, 1898. 



Montoyella nigra Castellani & Chalmers, Man. Trop. Med. ed. 2, 799, 1913, 

 non Dematium nigrum Link 1809. 



Cladosporium Wernecki Parreiras Horta, Rev. Med. Cirurg. do Brasil 29: 

 269-274, 1921. 



Cladosporium sp. Rietmann, Bull. Soc. Derm. Syphiligr. 37: 202-207, 1930; 

 Sartory, Sartory, Rietmann & Meyer, C. R. Soc. Biol. 104: 878-881, 1930. 



The organism usually isolated from black Carate, pinta, or Kcara in South 

 America. Pena Chavarria & Shipley (1925) report a species of Alternaria 

 from such lesions [probably a contamination]. 



