692 A MANUAL OF THE PENIOILLIA 



NRRL 1124, from Simonart in 193(3 as Paecilomyces varioti Bainier; and 

 two strains received from the Centraalbureau under this name in July 1946. 

 Viewed in conjunction with the descriptions and figures found in the 

 literature, the structural type here recognized as Paecilomyces is seen to be 

 cosmopolitan and is found described under several generic names, includ- 

 ing: Corollium, Spicaria, Penicilium, Paecilomyces, Eidamia, Byssochlamys, 

 and perhaps others. No one at present knows this group well enough to 

 establish sound hues of relationship among them. 



Byssochlamys fulva Olliver and Smith, in Jour. Bot. 72: 196-197; PI. 602, 



figs. 1 and 2. 1933. 



Authors' diagnosis as follows: 



"Colonies growing well on most solid media, better on natural than on purely 

 synthetic media, most readily at temperatures between 30° and 37°C.; on liquid syn- 

 thetic media growing fairly slowly at 20°-25°, better at 30°; at 37° the spores are 

 readily wetted by liquid media, and growth is very slow until the submerged my- 

 celium reaches the surface: surface white, then buff to pale brown in central areas, 

 slightly fioccose or funiculose, after seven to ten days showing clusters of asci visible 

 to the naked eye as minute globose masses partially embedded in the mycelial felt; 

 reverse slowly turning pale brown; conidial fructification of the Paecilomyces type, 

 conidiophores very variable in length, arising as side-branches from long trailing 

 hyphae, simple or variously branched, 2-3^ in diameter, bearing whorls of sterigmata 

 or solitary sterigmata at various points along the length, sessile or on short side 

 branches; sterigmata short tubular or much swollen at the base and terminating in 

 long slender tubes, frequently curved or bent away from the main axis, up to 25/i long 

 and usually 2-3^ in diameter, but occasionally up to 7^i; conidia one-celled, hyaline, 

 ovate to elongate, very variable in size but mostly 4-9^ x 2.3-2.5^, borne in very long, 

 unbranched, tangled chains; asci abundant on all media, produced in roughly globose 

 clusters without any trace of peridium or enveloping hyphae, globose, 8-spored, 11- 

 12/11 in diameter; ascospores smooth, hyaline, ovate, 6-6.5/li x 4.3-4.5/x. 



"The natural habitat has not yet been discovered, all isolations having been made 

 from canned and bottled fruits. The mature spores can survive cooking for thirty 

 minutes at 87°-88°C., which explains their survival in the processed cans and bottles, 

 since the maximum temperature of sterilization, although it may exceed 90°, is main- 

 tained for only a few minutes." 



The present species has been under observation in our Laboratory since 

 1933 without losing its capacity to produce abundant ascospores (fig. 171D 

 and E). It is maintained as NRRL 1125. 



The above description is drawn with sufficient care to obviate the neces- 

 sity of any additional notes on our part, either cultural or morphological. 



OCCURRENCE AND SIGNIFICANCE 



^ Members of the genus Paecilomyces have been found in the most diverse 

 environments in nature. Turesson (1916) isolated a strain from human 



