668 



MEDICALi MYCOLOGY 



Spores borne singly on tips of conidiophores. 

 Conidiophores unbranched. 

 Monotosporieae. 

 Conidiophores branched. 



Trichosporieae. 

 Spores two-celled. 



Spores hyaline. Hyalodidymeae (p. 851). 



Spores Colored. Phaeodidymeae. 



Spores multicellular. 



Confined to the horny layer of the epidermis, hair, rarely on nails. 



Trichophytoneae ( Gymnoascaceae Imperfectae) (p. 433). 



Not isolated from such situations; several groups not known to be pathogenic although 

 some, as Alternaria (Fig. 105), Stemphylium, Fusarium, etc., may be serious lab- 

 oratory contaminants; in the case of the latter there are two or three cases 

 where the fungus had multiplied on the host and caused irritation at least. 

 Several species from these groups are suspected of producing allergy. (For re- 

 view of this literature see Brown, 1932.) 



