ASYMMETRICA-FASCICULATA 483 



temperature, often more or less zonate, in some strains strongly fasciculate, 

 in others loose-textured approaching floccose but showing a limited de- 

 velopment of fascicles or tufts (fig. 125A), and in still others essentially 

 velvety, or scantily "granular" in the marginal area, usually showing few 

 to many radial furrows, heavily sporing throughout in some strains, less 

 heavily sporing in others with conidial development heaviest in marginal 

 to submarginal zones, conidial areas when young characteristically in 

 bright yellow-green shades near fluorite green to deep malachite green 

 (Ridgway, PL XXXII) in some strains to greenish glaucous or pistachio 

 green (R., PI. XLI) in others, darkening in age but usually remaining per- 

 sistently green; exudate abundantly produced in some strains, not in 

 others, clear to pale yellow; odor strong, moldy, and in some strains sour- 

 ish; reverse at first colorless to yellowish, in some strains remaining so, in 

 others becoming dull brown in age. Penicilli comparatively large, up to 

 65 to 70m hi length, bearing conidia usually in tangled chains up to 100 to 

 ISOju long or in irregular and poorly defined columns (fig. 124A); conid- 

 iophores commonly 150 to 250^ by 3.5 to 4.5ju but variable and occasion- 

 ally longer up to 400m in length and 6.0 to 6.5m in diameter, with walls 

 typically roughened; penicilli often irregular, with branches, metulae and 

 sterigmata not consistently produced at different levels, usually showing 

 1 to 3 branches 20 to 40m by 3.5 to 4.0m, in addition to the main axis (fig. 

 124B), occasionally showing secondary branches, with each branch or 

 sub-branch bearing 4 to 6 metulae, mostly about 12 to 16m by 3.0 to 4.0m 

 but occasionally larger or smaller; sterigmata commonly in clusters of 5 

 to 8 and measurmg 7 to 10m by 2.2 to 3.0m, usually borne at approximately 

 the same level in some strains, not in others; conidia elliptical when first 

 formed, often remaining so and measuring up to 4.5 by 3.3m, mostly be- 

 coming subglobose, 3.0 to 3.5m in diameter, or occasionally up to 4.0 to 

 4.5m, with walls delicately roughened (fig. 124C). 



Colonies on steep agar growing somewhat more rapidly than on Czapek, 

 but retaining the same general pattern, heavier sporing in most strains, 

 bright yellow-green in young conidial areas and commonly remaining green 

 in age; odor strong as on Czapek; conidiophores less consistently rough- 

 ened; penicilli as described above; conidia more consistently elliptical and 

 commonly less roughened than above. 



Colonies on malt agar varying markedly, in some strains spreading, 

 plane, heavily sporing, and somewhat granular (fig. 125B); in others re- 

 stricted, velvety or tufted in the marginal area only; odor pronounced, in 

 some strains suggesting fresh mushrooms; penicilli generally shorter and 

 less variable in length, tending to be compact; conidiophores conspicu- 

 ously roughened; conidia, for the most part, smooth-walled and commonly 

 remaining elliptical, often measuring 4.5m by 3.0m. 



