ASYMMETRICA-LANATA 431 



sions contributed by workers outside this Laboratory. Two of the species 

 recognized are known only from the type strains which have been main- 

 tained in laboratory culture for many j^ears. ^^lembers of this series, 

 like the Camembert cheese molds, appear to be comparatively stable in 

 culture. 



Seven species are recognized, and these may be differentiated in the 

 manner outlined in the general key to the Lanata, a portion of which is 

 reinserted above. 



The series is probably artificial in character, and it is entirely possible 

 that certain species are more nearly related to forms included in other 

 sections than to other members of the present series. Penidllium lanoso- 

 viride Thom, for example, bears a striking resemblance to P. -psittacinum 

 Thom in the Funiculosa and likewise to certain members of the P. viri- 

 dicatum series in the Fasciculata. The possibility that all of these species 

 represent members of a single natural group should not be overlooked. 



There are striking resemblances between Thom's species P. commune 

 and P. hiforme, that are included here, and P. -puherulum Bainier which 

 Thom in 1930 placed in the ^"elutina and which we now assign to the P. 

 cyclopimn series in the Fasciculata. Similarly, P. aurantio-candidum 

 Dierckx, included here because of its deep lanose colonies, shows striking 

 resemblances to P. aurantio-virens Biourge, a fasciculate species also in- 

 cluded in the P. cydopium series. 



Differences in colony texture and pattern may lack the basic significance 

 that we tend to attribute to them in our present system of classification. 

 Fully cognizant of this possibility, we still feel that the bases employed 

 are the most satisfactory developed up to this time. "Wliile certain species 

 and strains ma}" be keyed away from closely related species, we believe that 

 the number of such errors is limited. We have considered the desirability 

 of withdrawing the present Section completely and assigning individual 

 species to different series in other sections, primarily in the Fasciculata, 

 to which they seem to be most nearly related. \Yhi\e such a course might 

 be desirable from the viewpoint of evolution, we regard it as impractical 

 for this Manual, the primary purpose of which is to enable mycologists to 

 identify recognizable species of Penicillia. In any study of the biochemi- 

 cal potentialities of members of this series, the investigator is advised to 

 examine carefully those species in other sections which are cited as possibly 

 clo^-ely related in the brief discussions that follow the descriptions of indi- 

 vidual species. 



Penicillium lanosum Westling, in Arkiv for Botanik 11: 55, 97-99, figs. 

 18 and 60. 1911. Thom, The Penicillia, pp. 317-318. 1930. 



Colonies on Czapek's solution agar attaining a diameter of 2.5 to 3.0 

 cm. in 10 to 12 days at room temperature, consisting of a floccose over- 



