256 A MANUAL OF THE ASPERGILLI 



bridging the gap between .4 . tamarii Kita and the A . flams group. Without 

 publication they referred to these as "The Bronze Series." These strains 

 have the yellow-green color of A. flavus during the early stages of their 

 development, but subsequently develop the yellow to brown colors of A. 

 tamarii. Recognition of this border group is necessary since some strains 

 of A. tamarii do not assume a definitely green color at any state in their 

 development, while others show green as a transient character. Strains 

 of .4. flavus, on the other hand, are typically characterized by the green 

 to yellow-green colors. Furthermore, the conidia of A . tamarii are typically 

 quite roughened, showing prominent tubercles or bars of coloring matter 

 deposited between the outer and inner walls. In contrast, the conidia of 

 A. flavus are less coarsely roughened and show more numerous and smaller 

 tubercles or echinulations, as well as a greater tendency for the coloring 

 substance to be generally diffused throughout the spore envelope. The 

 forms under consideration show, in some degree, the coloration and spore 

 characters of both groups and are believed to be truly intermediate be- 

 tween A. tamarii and A. flavus. 



The fact that we received from Baarn in 1933, as Blochwitz's A. luteo- 

 virescens Bloch. (Ann. Mycol. 31: 73-83. 1933) a culture (Thorn No. 

 5345) which represented satisfactorily this intermediate series is not 

 accepted as justifying the assignment of this name to the series, since the 

 morphological characters displayed by the strain were so completely at 

 variance with the original description, and since Blochwitz considered his 

 species to be close to A. ustus. We question whether any sharp line of 

 separation can be drawn between the two series because of the repeated 

 appearance of intermediate forms. While we do not feel justified in 

 assigning to these forms any specific designation, we do feel obligated to 

 continue to call attention to their existence. We have at times considered 

 the desirability of moving the whole A. tamarii complex over into the A. 

 flavus-oryzae group, but this course has been abandoned since it was felt 

 that to do so would introduce into an otherwise perfectly integrated 

 group, a series of organisms whose relationship to them, while strongly 

 suggested, is not proved, and which in its typical form would introduce 

 discordant features. 



The species listed below are believed to represent probable synonyms: 



Biourge attached the manuscript name A. vulpinus to a member of the A. tamarii 

 series (Thorn No. 4733.146) and contributed it to our collection, but it does not seem 

 sufficiently different from the species to warrant separation. 



One strain of A. tamarii was found in the Bainier collection (Thorn No. 4640.397) 

 as A. cacao, nomen nudum; another under the same name came from Pribram. 



A. gigas Spegazzini, Myc. Argent. V, in An. Mus. Nac. Buenos Aires Ser. B. Tome 

 13: 424. 1911, was described from decaying coffee leaves in terms that suggest its 

 relationship to A. tamarii. 



