4<0 A MANUAL OF THE PENICILLIA 



element predominant or at least usually clearly evident; conidio- 



phores smooth or rough-walled P. cyclopium series 490 



1'. Colonies in dull blue-green shades, mostly azonate or indis- 

 tinctly zonate; conidiophores on Czapek agar generally 

 roughened; conidia usually subglobose. 

 aa. Colonies with surface usually granular or tufted and with 

 definite fascicles appearing at least in the marginal areas. 

 1". Conidia smooth or delicately roughened. 



P. cyclopium Westling 493 

 2". Conidia rough-walled and globose or nearly so. 



P. cyclopium West. var. echinulatum n. var. 497 

 bb. Colonies with fasciculation often reduced and with sporulat- 

 ing surfaces often appearing velvety or lanose. 



P. puberulum Bainier 497 

 2'. Colonies usually in brighter blue-green shades; often narrowly 

 zonate; conidiophores on Czapek agar generally smooth; co- 

 nidia usually elliptical, 

 aa. Colonies fairly rapidly spreading, heavily sporing on malt 



agar P. martensii Biourge 500 



bb. Colonies more restricted, non-sporulating on malt agar. 



P. aurantio-virens Biourge 503 

 c' Colonies typically in dull yellow-green, gray-green, or glaucous 

 shades; conidiophores smooth or rough; responsible for a de- 

 structive rot of pomaceous fruits P. expansum series 508 



1'. Conidiophores comparatively long, often up to 500/u or more in 

 length, with walls smooth or finely roughened; conidia abun- 

 dant but usually not forming definite crusts. 



P. expansum Link 512 

 2'. Conidiophores usually shorter, with walls conspicuously rough- 

 ened; conidia often forming definite crusts which break away 

 when the culture tube or dish is tapped. . . .P. crustosum Thorn 516 

 d. Colonies typically in pale to dull gray -green or gray shades, seldom 

 in yellow-greens; conidiophores typically smooth -walled. 

 1'. Colonies growing restrictedly upon Czapek but spreading 

 broadly upon steep and malt agars; sterigmata 8-12^ long, 

 few in the verticil; conidia strongly elliptical; responsible 



for a soft rot of citrus fruits P. ilalicum series 523 



P. italicum Wehmer 526 

 2'. Colonies growing rather restrictedly upon Czapek, steep and 

 malt agars; sterigmata 4.5 to 6.0ai in length, numerous and 

 crowded in the verticil; conidia broadly elliptical. 



P. urticae series 531 

 P. urticae Bainier 534 

 B. Colonies with most of the conidiophores arranged in fascicles or in definite 

 coremia. 

 1. Fascicles or coremia predominating, but interspersed with abundant 

 simple conidiophores; conidiophore walls roughened. 



P. granulatum series 539 

 a. Conidia globose to subglobose; colonies 1.0-2.0 mm. deep; conidial 

 areas in yellow-green to dark yellow-green shades; odor usually 

 not pronounced P. corymbiferum Westling 540 



