THE ASPERGILLUS GLAUCUS GROUP 103 



THE ASPERGILLUS REPENS SERIES 



Ascospores lenticular, mostly 4.8 to 5.4/x by 3.8 to 4.4/x, smooth-walled, 

 with equatorial area rounded or somewhat flattened and occasionally in- 

 dented showing a trace of furrow, but without crests or ridges. 



The Aspergillus repens series as based upon the ascospore described 

 includes a great number of universally distributed strains which retain 

 some cultural individuality. Consequently several of them have been 

 described as species by earlier workers. From comparison of a great series 

 of these forms, it' seems necessary to bring together under the name A . repens 

 (Cda.) DeBary, a very considerable number of forms (some of them regarded 

 as species by others) in which the ascospore is typical for the group and the 

 colony difference falls within lines of quantitative rather than qualitative 

 variation. 



The following key is offered as a means of separating culturally distinct 

 strains or groups of strains : 



A. Conidial heads large, borne above the surface layer of perithecia and enveloping 



hyphae. 



1. Heads radiate, long-stalked A. repens (Cda.) DeBary 



2. Heads columnar, short-stalked A. dierckxii Biourge 3 



B. Conidial heads small, enmeshed with the perithecia in a felt of sterile hyphae. 



1. Felt orange-yellow, loose-textured, radially wrinkled 



A. pseudoglaucus Bloch. 



2. Felt yellow-buff, close-textured, plane or nearly so A. profusus Hann 3 



Aspergillus repens (Cda.) DeBary, in Abhandl I. Senkenberg. Natiirf. 



Gesellsch. 7:379. 1870. 



Synonyms: A. glaucus var. repens Cda., Icones Fungorum 5: 53, Taf* 



II, fig. 27. 1842. 

 A. scheelei Bain, and Sart., Soc. Mycol. de France, Bui. 



Trimest. 28: 257-262, pi. X. 1912. 

 A. B var. scheelei Bain, and Sart., Soc. Mycol. de France, 



Bui. Trimest. 28 : 262-267, pi. XI. 1912. 



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

 plane or somewhat wrinkled, forming a rather compact felt (fig. 24 Ai), 

 with the marginal area near Scheele's green (Ridgway, PI. VI) from de- 

 veloping heads, older areas yellow-green to greenish-gray and enmeshing 

 large numbers of aborted perithecia producing few ascospores; normal 

 perithecia found only when such colonies spread over the bare walls of the 

 vessel. Reverse in shades of greenish-yellow at colony margin to deep 

 maroon or almost black in older areas. 



3 Species name not recognized as valid by authors of this publication. 



