ASYMMETRICA-FASCICULATA 469 



In all members of the group the penicilli are asymmetric, comparatively 

 large, and usually show one or more branches in addition to the main axis, 

 with each such major element terminated successively by verticils of me- 

 tulae, sterigmata, and long, usually divergent chains of conidia. Conidio- 

 phores typically arise directly from the substratum, are usually fairly 

 long and comparatively coarse; they may be either rough- or smooth- 

 walled. Colonies of many species produce a strong odor which is generally 

 diagnosed as moldy or earthy, although in some cases as aromatic. 



Key to the Fasciculata 



I. Species producing sclerotia. 



Page 



A. Fasciculation or aggregation of conidiophores usually encountered; peni- 



cilli typically branched below the level of the metulae. 



1. Sclerotia abundantly produced at 25-30°C., less abundantly at lower 



temperatures; conidiophore walls roughened P. gladioli series 471 



P. gladioli Machacek 471 



2. Sclerotia or perithecia produced in occasional strains or under special 



conditions; conidiophore walls smooth P. italicum Wehmer 526 



B. Fasciculation not encountered; penicilli usually showing a single verticil 



of metulae P. raistrickii series 



(see the Divaricata, p. 275) 

 II. Species not producing sclerotia. 



A. Colonies with simple conidiophores and fascicles intermixed, but with 

 simple conidiophores usually predominating. 



1. Colonies lacking true green colors in areas of ripe conidia. 



P. ochraceum series 475 



a. Conidial areas in j^ellowish olive, buffy olive or buffy brown shades. 



P. ochraceum (Bainier) Thom 477 



b. Conidial areas in lighter shades near sandy brown or pinkish buff. 



P. cameo -lutescens Smith 479 



c. Conidial areas colorless or in light cream shades. 



Color mutants of P. urticae and other species 536 



2. Colonies characteristically developing yellow-green, blue-green, 



or gray-green shades in areas of ripe conidia. 



a. Colonies typically in bright yellow-green to dark yellow-green 



shades; conidiophores usually rough-walled. P. viridicatum series 481 

 1'. Conidial areas showing bright yellow-green shades, at least when 

 young, 

 aa. Colonies remaining bright yellow-green in age or tardily 

 becoming light brown; odor pronounced. 



P. viridicatum Westling 482 

 bb. Colonies at first bright yellow-green but quickly becoming 

 dull and often showing vinaceous shades in older areas; 



odor very strong P. olivino-viride Biourge 487 



2'. Conidial areas quickly developing dark yellow-green shades. 



P. palitans Westling 488 



b. Colonies typically in blue-green (aeruginous) shades, with the blue 



