ASYMMETRICA-FASCICULATA 



517 



ened; penicilli usually consisting of the main axis and one appressed branch 

 15 to 30m by 2.5 to 3.5ju, bearing few metulae 10 to 18m by 2.8 to 3.3m; sterig- 

 mata mostly 8.0 to 10m by 2.5 to 3.0m, occasionally 12m, often borne at 

 different levels in the penicillus; conidia subgiobose to slightly elliptical, 

 mostly 3.5 to -4.0m ^^'ith walls smooth or nearly so. 



% 



Fig. 132. Penicillium criistosiun Thom on steep agar at two weeks. 

 been jarred slightly to reveal characteristic crusts of conidia. 



Culture has 



Colonies upon steep agar growing somewhat more rapidly, becoming 

 grayish olive (R., PL XLVI) within two weeks, shading to light brown in 

 age, generally more closely furrowed and tending to develop heavier conid- 

 ial crusts but otherwise essentially as described above; odor strong, earthy 

 or moldy; penicilli essentially as on Czapek but bearing spore chains com- 

 monly up to 250 to 300m long, conidiophores more coarsely roughened. 



Colonies on malt agar spreading, G.O to G.5 cm. in 12 days, plane, heavy 

 sporing with development of prominent conidial crusts, often zonate (fig. 

 131D), approximately sage green with green color tending to persist in age; 



