THE ASPERGILLUS GLAUCUS GROUP 111 



A strain, NRRL No. 45, received from Dr. B. O. Dodge and Miss Mar- 

 jorie E. Swift, of the New York Botanical Garden, in 1931, is characterized 

 by an intensely wrinkled colony and a further reduction in the size and 

 number of conidial heads (fig. 25 D). Colonies are dull orange red and bear 

 abundant perithecia enmeshed in a close felt of sterile encrusted hyphae. 

 Obviously it should be considered with A. pseudoglaucus. 



In cultures received from Baarn (NRRL No. 44) and from George Smith 

 (NRRL No. 45) as A . profusus Hann (nomen nudum) there is a pronounced 

 accentuation of the floccose habit already noted in A. pseudoglaucus. 

 Upon 20 percent sucrose Czapek agar these cultures, which are obviously 

 duplicates, produce spreading, plane or radiately wrinkled, floccose colonies 

 consisting of a close felt of light tan to buff -colored hyphae, bearing occa- 

 sional perithecia and widely scattered conidial heads. The perithecia are 

 commonly embedded deep within the felt, whereas the conidial heads are 

 most evident at the colony margin. Although the ascospores of these 

 strains are definitely of the A. repens type, they are generally flattened 

 along their equators and commonly show a trace of furrow. An occasional 

 ascospore shows a minute roughness in the equatorial region. The dif- 

 ferences observed do not seem to warrant perpetuating the name A. pro- 

 fusus, and in agreement with Dr. Westerdijk and coworkers (Centraal- 

 bureau List, 1939), the cultures have been assigned to A. pseudoglaucus. 



Culture NRRL No. 46, received from Raistrick in 1923 as Aspergillus 

 novus Wehmer (nomen nudum) bears ascospores duplicating those of the 

 cultures just considered. This strain is of particular interest, because in 

 routine transfers colonies of two distinct types commonly appear. One 

 of these is predominantly floccose and suggests the colonies of the strains 

 received as A . profusus. The other consists of a crowded surface layer of 

 perithecia, which is thinly veiled by a loose felt of orange-red hyphae, and 

 in its gross appearance, with the exception of its lighter color, is strongly 

 suggestive of certain cultures of Aspergillus ruber. The authors agree with 

 Wehmer (1901) and Blochwitz (1929a) that the species designation, Asper- 

 gillus novus, should be withdrawn. 



A nonascosporic culture distributed by Biourge as Aspergillus argillaceus 

 n. sp., was received upon two occasions from Prof. Raistrick's laboratory. 

 From its appearance in culture and the morphology of its conidial struc- 

 tures this fungus would seem to represent a member of the Aspergillus 

 repens series in which perithecial development has been wholly suppressed. 

 Although it is questionable whether this fungus represents a true species, 

 a brief description is given because of its inclusion in biochemical studies 

 by Raistrick and coworkers (1939, 1934, 1937). Colonies upon Czapek's 

 solution agar with 20 percent of sucrose spreading irregularly, consisting of 

 a loose floccose felt of aerial hyphae and abundant conidial heads, pale 

 yellow-green to clay color; reverse yellow. Upon Czapek's solution agar 



