410 A MANUAL OF THE PENICILLIA 



is duplicated in our Collection by NRRL 862. The two cultures around 

 which we center the above emended description of Penicillium brevi-com- 

 padum are distinctive, and from our current study of the P. hrevi- 

 compadum series, it is apparent that they do not represent P. stoloniferum 

 in the sense of culture NRRL 859, which is Thom's type (Thom No. 27) 

 of the latter species. They differ from the more widely distributed P. 

 stoloniferum in showing (1) more restricted colonies, (2) coarser and larger 

 conidiophores, and (3) branches, metulae, and sometimes sterigmata that 

 are definitely inflated. Two strains received from the Centraalbureau in 

 February 1946 as P. hagemi Zaleski (their isolations) produce colonies of 

 deeper yellow-green colors but show the same general colony characteristics 

 as noted above, and usually produce penicilli with cellular elements in- 

 flated. These cultures, now maintained as NRRL 2012 and 2013, are 

 regarded as representing hardly more than normal variations within the 

 species P. hrevi-compadum Diercloc. 



A culture brought by Dr. Simonart in 1936 from the Biourge collection 

 as Penicillium hrevi-coinpadum Dierckx (Biourge's No. 42) and now main- 

 tained as NRRL 863, shows a fairly compact penicillus suggestive of the 

 present series but produces colonies in much darker green shades, conspicu- 

 ously roughened conidiophores, and a strong penetrating earthy odor. 

 These latter characters are believed to indicate relationship to the P. terre- 

 stre series. If the culture can be considered in the P. hrevi-compadum 

 series at all, it must be regarded as transitional toward P. terrestre Jensen 

 and P. solitum Westling (see pp. 450-455). 



A number of described species are believed to approximate Penicillium 

 hrevi-compadum Dierckx as presented above. Undoubtedly these were 

 based upon strains believed to possess distinctive characters. When 

 original descriptions and figures are compared, and type strains still in 

 existence are examined in parallel cultures, the bases for species separations 

 largely disappear. Among species believed to be inseparable from P. hrevi- 

 compadum Dierckx are included the following: 



Penicillium crassuni Sopp (Monogr., p. 147-148, Taf. XVI, fig. Ill; Taf. XXII, 

 fig. 15. 1912; Thom, The Penicillia, pp. 297-298. 1930) is known only from the 

 author's original description. The species was apparently based upon some member 

 of the P. brevi-cotnpacium series but closer identification is now impossible; bodies 

 suggesting sclerotia were reported as occasionally produced on rice. Insofar as we 

 know, this is the only report of sclerotia being produced by a member of the series. 



Penicillium bialowiezense Zaleski (in Bui. Acad. Polonaise Sci.: Math, et Nat. Ser. 

 B, pp. 450-451, Taf. 39. 1927; Thom, The Penicillia, pp. 303-304. 1930) was de- 

 scribed as producing thin, plane, velvety colonies with central areas sometimes con- 

 ve.x, bearing conidiophores 400 to 600/i by 4.0 to 5.0/t, with penicilli comparatively long 



