THE ASPERGILLUS GLAUCUS GROUP 129 



tion with ascospores less than 7.5/x in long axis, yet larger than those of the 

 small -spored forms which he described. Having no faith in any of the 

 descriptions existing at the time, he called the aggregate Eurotium her- 

 bariorum series minor. The cultures cited above have sufficient common 

 characters to warrant the belief that they are variants of a common stock 

 which may be constituted a species aggregate to which we apply the 

 name Aspergillus mangini. 



Aspergillus umbrosus Bain, and Sart., in Soc. Mycol. de France, Bui. 



Trimest. 28: 267-269, pi. XII. 1912. 



Probable synonyms : A . mutabilis Bain, and Sart., in Soc. Mycol. de 



France, Bui. Trimest. 27: 458, pi. XVII. 1911. 

 A. mollis Bain, and Sart., Soc. Mycol. de France, 

 Bui. Trimest. 27: 453, pi. XVI. 1911. 



Colonies upon Czapek's solution agar (3 percent sucrose) very restricted, 

 attaining a diameter of 0.5 to 1.0 cm. in 3 weeks, raised, tufted, white to 

 orange-red, bearing neither perithecia nor conidial heads ; reverse colorless 

 to orange-brown. 



Colonies upon Czapek's solution agar with 20 percent of sucrose, plane 

 or somewhat wrinkled, spreading evenly or irregularly (fig. 33 B), reaching 

 a diameter of 8 to 10 cm. in 3 weeks, predominantly vinaceous red to orange- 

 brown in color, consisting largely of a surface felt of sterile hyphae encrusted 

 with orange-red granules enmeshing abundant perithecia, occasionally 

 characterized by a loose floccose overgrowth bearing scattered perithecia, 

 conidial heads pale blue-green, widely scattered and projecting above the 

 perithecial layer; reverse in red-brown shades. 



Perithecia abundant, yellow to orange, globose to subglobose, largely 

 embedded in a felt of sterile red-encrusted hyphae at the agar sur- 

 face, occasionally borne in a loose aerial felt, mostly 120 to 140m in 

 diameter, rarely up to 175m; asci 14 to 16m; ascospores lenticular, mostly 

 7.2 to 8.0m by 5.6 to 6.4m, occasional spores up to 8.4m in long axis, finely 

 roughened to smooth in the equatorial areas, ridges low and generally 

 rounded, furrow shallow, commonly V-shaped (fig. 34 A); conidial heads 

 few, scattered, projecting above the perithecial layer, pale bluish-green, 

 radiate, compact, mostly 175 to 250m in diameter; conidiophores smooth, 

 colorless to brownish, 700 to 850m in length, broadening to 15 to 20m 

 below the expanded, domelike vesicular apex; vesicle 25 to 40m in diameter; 

 sterigmata in a single series, 10 to 12m by 4.5 to 6m; conidia pale green, 

 elliptical to subglobose, spinulose, mostly 7 to 8m in long axis, frequently 

 larger. 



Represented in the present collection by culture XRRL No. 120 received 

 in 1925 from Dr. Florence A. McCormick, by European strains, and by 

 several cultures isolated by the authors. 



