MISCELLiANEOUS FUNGI IMPERFECTI 835 



Isolated from an Italian patient with a dermatosis in a hospital in Buenos 

 Aires. Pathogenic to rabbits, guinea pigs, and rats, not to hens. 



Hyphae 2/x in diameter, hyaline or slightly yellowish. Other hyphae 4-5/i, 

 in diameter, straight and darker; nodose hyphae of fusiform cells 15-25 x 

 5-8/i,. Stalks 40-250/x long, only 2-2.5/x in diameter in the lower third, expand- 

 ing to 5-lOfi in diameter. Vesicle 12-20/i in diameter, with a slender annular 

 line at the base, spores arising only from upper two-thirds. Total cross- 

 section of head 35-50/x,, greenish lead color. Phialides absent, basal conidia, 

 4/t* in diameter, spherical. Simple radiating chains of 4-6 conidia, diminishing 

 in diameter upward, 3.5-3.75/* in diameter below to 3/a above with thin, smooth 

 wall. 



Growth good on usual media between 12° and 37° C., especially good on 

 glucose media. Colonies cottony, white, yellowing in the center, becoming a 

 thick mat about 0.5-1 mm. thick, opaque on reverse with a white yellowing 

 border. Free surface between brown and greenish red, slightly pubescent or 

 occasionally cottony. Old colonies sometimes have an odor of hydrogen sul- 

 phide. Gelatin not liquefied. 



BOTRYTIDEAE 



Conidiophore differentiated, branched, branches not in verticils, bearing 

 solitary hyaline conidia at the tips of the branches. 



Key to Genera 



Conidiophores unbranched or slightly branched, or the branching only suggested by knobs. 

 Conidiophores wholly unbranched, conidia either pleurogenous or acrogenous. 

 Conidiophores branched slightly. Acladmm. 



Conidia sessile. 



Conidia ovoid or spherical. Haplaria. 



Conidia short cylindric. Cylindrotrichum. 



Conidia borne on sterigmata, etc. 



Conidiophores swollen above, conidia on long sterigmata. 



Physospora. 

 Conidiophores not swollen, 'conidia on short sterigmata. 



Fhymatotrichwm. 

 Conidia on warts. Cristularia. 



Conidiophores in fascicles, parasitic on plants. 



Conidia smooth. Ovularia. 



Conidia echinulate. Bam/ulaspora. 



Conidiophores much branched. 

 Conidia spherical or ovoid. 



Conidiophores dendroid, conidia single, acrogenous. Monosporvum. 



Conidiophores with a few long slender branches, conidia on very small sterigmata. 



Botrytis. 

 Conidiophores with many shorter, thicker branches, conidia on large sterigmata. 

 Conidia cylindric. Polyactis. 



Conidia all acrogenous. Cylindrophcn-a. 



Conidia acrogenous on short side branches but the terminal branches sterile. 



Cylvndrodendrwm. 



