MISCELLANEOUS FUNGI IMPERFECTI 837 



Found in Ceylon, Malay States, and Macedonia in small lesions usually 

 diagnosed as syphilitic. Ulcers sharply defined, roundish or oval, with red 

 granulating fundus. The purulent secretion dries up in thick yellow crusts 

 covering the ulcers. Gummatous nodules and furuncular lesions may also be 

 observed. Little or no pain, pruritus usually absent. Wassermann negative. 

 Mercury and arsenic compounds have no effect. Lesions promptly cured by 

 medication with KI (20 gm. t.i.d.). 



Hyphae 2/x in diameter with pseudoconidia of varying shape — cylindric, 

 pyriform, or spherical — -attenuate at point of insertion. Pseudoconidia, 4 x 

 2/A. Occasionally chlamydospores in short chains, spherical, often terminal, 

 8-lOyu in diameter (Fig. 131). 



Organism grows on Sabouraud agar, glucose agar, carrot or potato. Colo- 

 nies on carrot or potato whitish, covered with spiculated formations consisting 

 of straight parallel filaments. On glucose agar, after 4-8 days, colonies small, 

 amber yellow, becoming hemispheric and coalescing into a knotty mass. If 

 colonies do not fuse, they increase and show radiating furrows. 



Colonies dimorphic, smooth (mostly below 20° C. in malt agar). Oidia 

 and chlamydospores present; rough, with coremia bearing hyaline, pyriform, 

 sessile conidia, 2 x S/j. — Craik (1923). 



MONOSPORIUM 



Monosporium Bonorden, Handb. allg. Mykol. 95, 1851. 



The type species is Monosporium agaricinum Bonorden. 



Bonorden described his genus very briefly as possessing branched hyphae 

 bearing round or ovoid spores on the tips of the branches, the branches not regu- 

 larly divided. He treats 15 species and mentions 2 others. M. corticola, M. 

 agaricinum, M. spinosum (Fig. 132), M. memhranaceum, M. decumhens, M. viri- 

 descens, M. reflexum, and M. acuminatum are described as new, most of the 

 others evidently known to the author only from figures. The figures of M. 

 acuminatum, M. spinosum, M. agaricinum, and M. memhranaceum resemble each 

 other much more closely than they do the other members of Bonorden 's genus. 

 Within this group, the choice of type species is arbitrary. 



Hyphae repent, septate, branched; conidiophores erect; septate or not, 

 more or less dendroid, branched, branching often dichotomous ; branches usu- 

 ally tapering to a point, bearing a single hyaline, smooth, unicellular, thin- 

 walled, ovoid conidium. 



In the pathogenic species, the conidiophores are somewhat decumbent 

 and are said to have been transferred by Saccardo to a new genus, Scedo- 

 sporium, but I have been unable to find where this name was validly published. 

 Saccardo did not recognize this name in later volumes of his Sylloge Fungorum. 

 All of the pathogenic species so far reported have produced black grained 

 mycetoma pedis. 



