PENIdLLIUM NO. 24. 



67 



margin of unripened fruit and submerged mycelium during the growing period. 

 Reverse of colony and mm •ilium colorless under all conditions studied. < kmidiophores 

 from 100 i" H" 1 ". a> eraging about 250//, in length, either arising separately or as lateral 

 1 warn In-- of hyphae just above the substratum. Conidial fructification up to 200/j in 

 length produced by various branching from the conidiophores in which cadi primary 

 1. ranch is often divergent to produce separate massof conidia. Conidiiferou8cells7 10 

 by '■[■' Conidia globose 3.3 l/t, homogeneous blue-green, Bmooth, seeming to lose 

 vitality rapidly under laboratory conditions. Colonies liquefy gelatin in 7 to 12 days 

 so that they lie in pels of liquid. Litmus reaction strongly alkaline. 



Found in the culture- from Camemberl cheese in the laboratories at Men--. Conn. 

 Differs from the preceding and from P. citrinum by its longer conidiophores, the 

 alternate branching of its fructification, the Bize of its spores, and by failure to color 

 the substrata. The relative value of ellipticity of conidia as a diagnostic character 

 appear- to be questionable. This form is therefore presented under cultural number 



— ■ ■ 



Fig. 25.— Penicillium No. 24: a. h, branching and arrangement of branches in conidial fructification! X no); 

 c, d, (. conidiiferous cells and conidia < < 1,400); g, h.j, sketches of form and arrangement of conidiophores 

 (X 140); m, n, germination of conidia (X9O0 . 



only, whereas the preceding bas been identified from accidental cultures more fre- 

 quently, and hence j~ given oame and description as a species. 



Mill RAX DATA. 



Color deep green (blue-green), becoming brown when old and exposed; reverse 

 white or cream; color in media, none. 



( »dor, cone. 



Fifteen per cent gelatin in water, characteristic colony; liquefaction, rapid - 

 11 days or even less; litmus reaction alkaline, potato plugs, deep blue-green, crystal 

 drops. Etaulin's fluid, weak hut characteristic growth. Cohn's solution, slow hut 

 characteristic development . 



Synthetic fluid I Dox's), carbon supphed: Cane sugar, good growth up to 30 per 

 cent, acid reaction. Lactose, ■'< per cent, slow development, uol typical. Lactic 

 acid 0.9 per cent, good colony. Levulose 3 per cent, small colonies. Galactose :'• 



