114 A MANUAL OF THE ASPERGILLI 



To illustrate more definitely the variation that occurs, the following 

 outline of possible lines of separation is inserted: 



A. Colonies predominantly perithecial. 



1. Colonies red, perithecia abundant in a layer at the agar surface and over- 



grown by a felt of red encrusted hyphae 



A. ruber (Spieck. and Brem.) Thorn and Church, NRRL Nos. 52, 49 



2. Perithecia abundant in a loose, floccose overgrowth of red hyphae as well 



as in a layer at the agar surface NRRL No. 65 



3. Colonies thin, orange-red, perithecia abundant in old cultures and on very 



concentrated media NRRL No. 70 



B. Colonies predominantly conidial. 



1. Colonies gray, heads long-stalked, perithecia few NRRL No. 75 



C. Colonies mixed conidial and perithecial. 



1. Colonies orange-red and green, zonate, perithecia borne at the agar surface 

 and piled in a loose network of superficial hyphae NRRL No. 71 



D. Colonies predominantly floccose, colonies red-brown, perithecia and conidial 



heads few ^4. lovaincnsis Biourge, 4 NRRL No. 76 



Aspergillus ruber (Bremer) 



Synonyms: A. ruber (Spieckermann and Bremer) Thorn and Church, in 



The Aspergilli, 112. 1926. 

 Eurotium rubrum Bremer, in Zeitschr. f. Untersuch. d. Nah- 



rung. und Genussmittel IV. 1901, p. 72, also in Die fett- 



verzehr. Organismen in Nahr. u. Futtermitteln, Dissert. 



Munster 1902. 

 E. rubrum Spieckermann and Bremer, in Landw. Jahrb. 31 : 



81-128. 1902. 

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



Trimest. 27: 361-367, pi. XL 1911. 



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

 plane (fig. 24 Ci), orange-brown to red-brown in color; perithecia generally 

 abundant though often abortive; conidial heads pea-green to olive-green, 

 abundant in some strains, few and largely vestigial in others ; reverse orange- 

 red to maroon. 



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

 ing rapidly and broadly in a regular manner or unevenly, plane, predom- 

 inantly red, ranging from ferrugineous to morocco red; perithecia very 

 abundant, borne in a dense layer at the agar surface and largely concealed 

 within and beneath a close-textured felt of red-encrusted hyphae; conidial 

 heads projecting above the felt, pale gray-green to deep olive-gray, more or 

 less abundant, and generally crowded near the center or scattered unevenly 



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



