ASYMMETRICA-LANATA 441 



Penicillium lanoso-grisewn Thom, in The Penicillia, p. 327. 1930. 



Colonies upon Czapek's solution agar forming deeply floccose felts 

 3.0 to 3.5 cm. in diameter and 1 to 2 mm. deep in 10 to 12 days at room 

 temperature (fig. 114E), with growing margins white, several mm, broad, 

 fruiting abundantly with conidial areas in dull green shades ranging from 

 bluish glaucous (Ridgway, PI. XLII) at the very edge through shades of 

 glaucous blue to shades of olive gray and finally mouse gray (R., PI. LI), 

 zonation in the form of raised areas commonly becoming more or less evi- 

 dent in older colonies; exudate abundant, as colorless drops enmeshed in 

 the floccose mycelial mass; reverse colorless or faintly yellowish; odor 

 slight; conidiophores variously produced as branches from aerial or from 

 submerged hyphae, up to 1 mm. or more in length by 3.0 to 4.0m in diame- 

 ter, with walls pitted to coarsely granular in age; penicilli usually rather 

 compact, often branched with branches variable in length, bearing verti- 

 cils of metulae and sterigmata and producing conidial chains in more or 

 less columnar masses or variously splitting or becoming tangled in age; 

 metulae 12.0 to 20.0m long; sterigmata up to 12.0m by 2.5 to 3.0m; conidia 

 mostly elliptical, about 4.0 by 3.0m, smooth-walled, commonly found in 

 chains in mounts. 



Colonies on steep agar 3.0 to 3.5 cm. in diameter with surface appearing 

 more or less granular or tufted in 10 to 12 days, deeper than on Czapek, 

 up to 3.0 mm., with broad white margin raised and even more conspicuous, 

 radially furrowed in marginal zones, heavily sporing in central colony 

 area in colors as described on Czapek but maturing more rapidly; exudate 

 less abundant; odor unpleasant; reverse uncolored or in light buff shades; 

 penicilli as described above. 



Colonies on malt extract agar duplicating the above in rate of growth, 

 plane, commonly zonate (fig. 114F), with traces of ropiness or fascicula- 

 tion throughout the entire colony but most conspicuous at the margins, 

 heavily sporing in gray-green shades near gnaphalium green (R., PI. 

 XLVII); exudate lacking; odor spicy; reverse uncolored or in light buf? 

 shades; penicilli as described above. 



Species description based upon the type, NRRL 894 (Thom's No. 

 2746.2a from leaf mold collected for him by C. J. Koning in "Spanders- 

 woud" near Bussum, Holland, in 1913). NRRL 886, isolated from dairy 

 products by Professor Macy, University of Minnesota duplicates the above 

 culture closely enough to warrant consideration with it. NRRL 886 

 grows more rapidly and produces a larger colony than NRRL 894, but in 

 other details the two strains seem to duplicate one another. 



The name is used to designate a deeply lanose species with gray conidial 



