102 A MANUAL OF THE ASPERGILLI 



Group Limits and Relationships 



Exceptional strains lacking perithecia but presenting conidial morphology 

 clearly belonging to the A. glaucus group in its strictest sense are occa- 

 sionally found. In addition, the A. reslrictus series (A. penicilloides series 

 of George Smith, 1931) shows conidial morphology clearly related to the 

 group, but differing markedly from the usual types in colony coloration and 

 in the absence of perithecia. Thorn and Church (1926) considered these 

 latter types as representing intermediate forms between the Aspergillus 

 glaucus and A. fumigatus groups. In the present treatment, we include 

 them as non-ascosporic and for the most part diminutive forms sufficiently 

 related to the ascosporic species to be included with them in the A . glaucus 

 group. 



Certain other groups of the Aspergilli present characters suggesting those 

 of the "glaucus" group considered here. The ascospores of A. fischeri 

 Wehmer (See A. fumigatus group) and of the A. nidulans group (which 

 see; also Thorn and Raper, 1939) in general resemble those of the A. 

 glaucus group, but the yellow perithecia suspended by yellow and red 

 encrusted hyphae do not occur outside of this group. 



Group Key (Based Primarily Upon Perithecia and Ascospores) 



I. Perithecia present. 



A. Ascospores lenticular, 6m or less in long axis. 



1. Ascospores with convex faces smooth (or nearly so). 



a. Equatorial ridges lacking, furrow absent or showing only as a trace 



A. repens series 



b. Equatorial ridges low and rounded, furrow broad and shallow 



A . ruber series 



c. Equatorial ridges thin and flexuous, crestlike (spore resembling 



a pulley) A. chevalieri series 



2. Ascospores with convex faces rough A. amstelodami series 



B. Ascospores lenticular, 6m or more in long axis 



Large-spored species or the (E.) herbariorum series 



II. Perithecia absent. 



A. Colonies predominantly in yellow-orange to brownish shades. 



1. Heads approximating those of A. repens A. argillaceus Biourge 2 



2. Heads proliferating, giving rise to many subheads 



A. proliferans G. Smith 



B. Colonies in dark green or blue-green shades. 



1. Restricted, velvety, with short conidiophores and abundant columnar 



heads A . reslrictus series 



2. Spreading, floccose, with long conidiophores and globose heads 



A. itaconicus Kinoshita 



2 Culture distributed by Biourge as a new species. Believed to represent only a 

 non-ascosporic strain of A. repens, hence not recognized as a valid species by the 

 writers (see p. 111). 



