YEASTS AND MOLDS 



3 11 



report is based, including a full description of the toxigenic parasite, will 

 be given in a later report." 



A saccharomycetous ascomycete (N ematospora Lycopersici, n.-sp^ 

 was found on some ripe tomatoes obtained from a Berkeley (California) 

 restaurant. The tomatoes were from a lot in cold storage which, so it 

 was claimed, were imported from the South Sea Islands. The specimens 



FIG. 8 1 . Various forms of vegetative cells of N ematospora Lycopersici. Extremes in 

 cell formation are not shown. Very frequently some of the hyphal filaments resemble 

 the hyphae of true molds, but the individual cells do not branch. B, arthrospores; C, 

 the beginning of spore sac formation. 



under consideration appeared normal with the exception of an area about 

 % inch in diameter. This area was slightly depressed, of a cancerous 

 raw reddish color. The epidermal tissue appeared markedly indurated 

 and somewhat shrunken, but the hypodermal tissue as well as the paren- 

 chymatous tissue underneath appeared to be nearly normal. The micro- 

 scopical examination showed the presence of a fungus in the seed chamber 

 and in the mucilaginous tissue surrounding the seeds, as well as in the 

 parenchymatous tissue beneath the epidermis. 



This fungus proved of special interest because every slide mount 

 examined, showed the complete ' life cycle of the organism, including the 

 formation and development of the polymorphic vegetative cells and the 



1 Albert Schneider. A Parasitic Saccharomycete of the Tomato. Phytopathology. 

 6:395-399- 



