ASYMMETRICA-DIVARICATA 305 



ing from light celandine green at colony margin, through celandine green 

 to mineral gray (R., PI. XLMI) to olive gray or even deep olive gray (R., 

 PI. LI) in colony center; radial furrows more strongly developed; limited 

 colorless exudate produced; odor lacking or indefinite; reverse colorless to 

 dull yellow; penicilli generally larger than on Czapek, consisting of a greater 

 number of monoverticillate-like structures, and with conidial chains even 

 longer and more divergent; arrangement and measurements of metulae and 

 sterigmata as on Czapek. 



Colonies on malt agar spreading, in some strains completely covering the 

 plate in 10 to 12 days, in others attaining a diameter of 5 to 6 cm., plane, 

 heavily sporulating throughout, almost velvety (fig. 81D), gnaphalium 

 green to celandine green (R., PI. XLVII); no exudate produced; reverse 

 in dull 3^ellow shades or occasionally appearing purplish; penicilli as de- 

 scribed above except that metulae are more consistently clustered in true 

 biverticillate fashion ; conidiophores and metulae with walls roughened and 

 with contents appearing vacuolate. 



Species description centered upon culture NRRL 902, received in 1940 

 from Mrs. E. M. Laughton, Cape Province, South Africa, as an isolate from 

 a flannel bag; and additional cultures, mostly isolated from deteriorating 

 fabrics, contributed by various collaborators. The species as here de- 

 scribed seems to be associated most commonly with the deterioration of 

 textile products under field conditions, but the form should be considered 

 as typically a soil organism that might be expected to occur wherever 

 mixed contamination occurs and conditions favor its development. 



Penicillium ochro-chloron Biourge, in Monogr., La Cellule 33: fasc. 1, pp. 



269-270; Col. PI. X and PI. XVII, fig. 100. 1923. Also Thom, 



The Penicillia, pp. 363-364. 1930. 



Colonies on Czapek's solution agar growing rather rapidly, attaining a 

 diameter of 4.0 to 5.0 cm. in 12 to 14 days at room temperature (25°C.), 

 consisting of a closely interwoven basal felt of fine vegetative hyphae with 

 surface somewhat floccose and cottony (fig. 82A), 0.5 to 1.0+ mm. deep, 

 showing trailing hyphae or thin ropes of hyphae, at first near pure white 

 but becoming slightly tinted after 8 to 10 days and at two weeks commonly 

 approximating cartridge buff (Ridgway, PL XXX) or even showing light 

 flesh shades, with central colony areas commonly depressed and with outer 

 areas sometimes showing broad shallow radial furrows, azonate or in some 

 cases becoming zonate with the more abundant development of conidial 

 structures in submarginal areas; conidial structures usually produced in 

 limited numbers, often hardly affecting the overall appearance of the 

 colony; exudate produced abundantly in some strains, not in others, color- 

 less; odor lacking or slightly sourish; reverse in buff to flesh colors with 



