192 A MANUAL OF THE ASPERGILLI 



pletely lacking; reverse and substratum occasionally colorless or nearly so, 

 mostly passing through shades of yellow to orange then rose, purple-red or 

 red, the particular shade and intensity of color normally persisting as a 

 strain or varietal character. Heads roughly hemispherical, radiate, up to 

 100 to 125m in diameter; rarely approaching columnar. Conidiophores 

 colorless, smooth, up to 500 or even 700m by 5m or approaching 10/x near the 

 vesicles. Vesicles 12 to 20m in diameter, fertile area hemispherical or semi- 

 elliptical (fig. 55) passing almost imperceptibly into the funnel-like enlarged 

 apex of the conidiophore. Sterigmata in two series, primary commonly 8 

 to 10/x by 3m, occasionally less, secondary 5 to 10m by 2 to 2.5m. Conidia 

 globose, usually delicately echinulate, mostly 2.5 to 3m, occasionally 3.5m or 

 4m, usually borne in loosely radiating chains. 



In occasional highly colored strains vesicles and sterigmata may be 

 colored. 



Hiille cells of the Aspergillus nidulans type are occasionally seen. 



Neither perithecia nor sclerotia have been found. 



The diagnosis is drawn broadly enough to cover a common and very 

 abundant series of organisms which vary greatly in colony appearance. In 

 some strains aerial growth is composed of conidiophores and heads only; in 

 others it is made up of floccose felts or ropes of hyphae bearing short conidio- 

 phores and small heads which retain the characteristic arrangement of 

 vesicles, sterigmata, and conidial chains. 



The wide range of colony structure and coloration of strains, 1 and the 

 varied conditions under which these have been collected probably account 

 for the appearance of many names in the literature which refer to cultures of 

 the group but which cannot be safely separated and identified by the de- 

 scriptions given. 



The following list of species are believed to represent synonyms: 



S. ambari Beauregard (Ann. de Micrographie 10: 255-278, pi. 1. 1898). Probably 

 one of the series, but never identified again. 



S. bicolor J. Ray (Rev. Gen. Bot. 9: 193-212, 245-259, 282-304, PI. 12-17. 1897) 

 is probably one of this series. Primary sterigmata were reported filled with red 

 coloring matter and conidia globose, spinulose, up to 2.5ju in diameter. 



Sterigmatocystis brodeni Mattlet (Name only in Ann. Soc. Beige Med. Trop. 6: 

 31, 1926; discussion, ibid 4: 167-171, figs. 1, 2. 1924). Apparently a member of 

 this series. 



A. flavo-viridescens Hanzawa (Jour. Coll. Agr. Tohoku Imp. Univ. Sapporo 4: 

 232-3, pi. 21, figs. 1-4. 1911). Culture No. 4291.10 (Thorn) received from Hanzawa 

 under this name belongs to the A. versicolor group. 



A. versicolor var. glauca Blochwitz (Ann. Mycol. 32(1/2): 86. 1934). This variety 

 has the color of the A. glaucus group which is more deeply blue than A. versicolor. 

 Isolated in the skin clinic at Kiel upon human skin showing "ringworm.' 



>> 



1 For a more complete discussion of the range of cultural types found in this series, 

 the reader is referred to Thorn and Church, The Aspergilli, pp. 142-145, 1926. 



