MONOVERTICILLATA 



147 



2.5 to 3.5m with conidium-bearing tips comparatively long and definitely 

 narrowed; conidia mostly elliptical, 4.0 to 5.0m by 3.5 to 4.0/i, with ends 

 often more or less pointed, smooth-walled. Perithecia abundantly pro- 

 duced, globose to oblong up to 150 to 200^ in diameter (fig. 40C), ripening 



Fig. 40. Penicillium ehrlichii Klebahn, NRRL 708. A and ii, Two-week-old col- 

 onies on Czapek and malt agars. C, Low-power view of perithecia, X 40. D, Asco- 

 spores, X 1500; note conspicuously roughened walls and equatorial furrows in occa- 

 sional spores that are properly oriented. 



slowly, at 2 weeks composed throughout of pseudoparenchymatous tissue, 

 developing asci and ascospores after 15 to 20 days; asci borne as lateral 

 branches from fertile hyphae, spherical to oblong when ripe, 8 to 10/x in 

 diameter, 8-spored, ascospores lenticular, 3.5 to 4.0m by 3.0 to 3.5m, with 

 walls conspicuously spinulose and showing a shallow equatorial furrow and 

 low marginal crests (fig. 40D.). 



Colonies on steep agar spreading broadly, attaining diameters up to 8 cm. 



