THE ASPERGILLUS GLAUCUS GROUP 135 



typically 8-spored, frequently with some or all spores aborted; ascospores 

 lenticular, variable in size and pattern, mostly 7.2 to 8.4/z by 6 to 6.5^ but 

 often larger (up to 9.0/x in long axis) or smaller (down to 6.5yu in long axis), 

 generally smooth-walled but occasionally roughened in equatorial area, 

 generally rounded but often flattened and occasionally indented, with 

 ridges wholly absent or indefinite, and with furrow absent or present as a 

 trace only. 



Conidial heads sparsely produced, commonly scattered, dull gray-green, 

 radiate, compact, mostly 150 to 200/z but often up to 250/x in diameter; 

 conidiophores smooth-walled, colorless, long, commonly up to 2 mm. in 

 length, uniform in diameter, 12 to 18m, to just below the vesicle; vesicle 

 subglobose, 40 to 50^ in diameter and occasionally larger; sterigmata in a 

 single series, crowded, bottle-shaped, 10 to 12^ by 5 to 6m; conidia globose 

 to subglobose, echinulate, dull green, mostly 8 to 10^. 



Species description based upon culture NRRL No. 126 received in 1937 

 as Aspergillus carnoyi Biourge from George Smith and by him earlier from 

 Biourge. Presumably the culture is type, although Biourge 's description 

 of the species remains unpublished. The culture is distinct, not only differ- 

 ing in its colony character and in the length of its conidiophores but espe- 

 cially in the variable character of its ascospores. The majority of spores, 

 although much larger, resemble those of A. repens, whereas spores with 

 rough walls are occasionally produced. This culture is, therefore, somewhat 

 of an exception to the general rule of constancy in ascospore pattern, and 

 the variability of its spores affords one of the best characters for its identifi- 

 cation. 



Aspergillus niveo-glaucus Thorn and Raper, U. S. Dept. Agr. Misc. Pub. 



426, p. 35. 1941. 

 Synonyms: vl. glaucus mut. alba Bloch., Deut. Bot. Gesell. Ber. 50: 

 248-256. 1932. 

 A. glaucus var. albida. Speg., An. del Mus. Nac. de Buenos 

 Aires 6: 332. 1899. 



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

 1 cm. in diameter after 4 weeks, white to cream, bearing abundant small 

 conidial heads but no perithecia; reverse colorless to yellow-brown. 



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

 growing, plane, spreading irregularly, 6 to 8 cm. in diameter after 4 weeks 

 (fig. 33 D), thinning toward the margin, with mycelium in shades of yellow- 

 orange becoming cinnamon brown in age, more or less obscured by abun- 

 dant white heads, and with perithecia abundant, yellow (PI. Ill F), em- 

 bedded and irregularly clustered in a close felt at the agar surface ; reverse 

 yellow at margin to deep brown at colony center. 



Perithecia abundant, yellow, globose, to subglobose, mostly 100 to 125/x 



