PENICILLIUM BR KV I C A C LK. 



47 



Fifteen per cent gelatin in water, typical colony; liquefaction, rapid — 5-6 days; 

 litmus. Btrongly alkaline. Prefers alkaline, neutral, or only slightly acid media. 

 Potato agar, spores sometimes refuse even to germinate, bul grow when transferred 

 to gelatin; grows poorly on agar media in'*' from sugar, or peptone, or the by-products 

 of other fungus growth. < !ommon as a secondary growth in such plates. Potato plu 

 good colonies. Conn's solution, characteristic but slow growth. Raulin's fluid, 

 germinated, bu1 veryslighl growth. 



Synthetic fluid (Dox's), carbon supplied as: Cane sugar in agar 3 per cent, failed 

 to grow, same spores transferred to gelatin media grew promptly. Lactose K) percent, 

 plow, characteristic color to conidia. Lactic acid o.'.i per cent, germination only. 

 Levulose 2.5 per cent, growth characteristic, alkaline reaction to litmus. Galactose 

 3 per cent, characteristic growth, alkaline reaction to litmus. Glycerin 3 per cent. 

 ,-poie- germinated only, grew well upon addition of cane sugar. Potato starch grew 

 well. Malic acid, germinated only. Butter fat, slow development, finally producing 

 drops of yellow oil which separate out. 



Milk, rapid growth: curdling (0.25 per cent calcium chlorid added) in 10 days; 

 digestion, rapid; culm- in milk, none. 



Cooked apple, failed to grow after repeated inoculation. 



At 37 and 20 I '.. grew equally well. 



I io. 13.- /'< niriiiuiu brevicauli , Tar. album.' ';. b, c, a", eonidlophores and fructification borne variously and 

 differently branching I < 900); e,f, ripe conidia; g, h, sketch of single hyphseand a rope of hyphae bearing 

 eonidlophores i X 140); j, germinated spore. 



PENICILLIUM BREVICAULE Saccardo, var. ALBUM Thorn, n. var. 



Colonic- upon Bugar gelatin white to cream-colored alike above and below upon all 

 media, stricl to sparsely floccose, with trailing hyphse and ropes of hyphse, indeter- 

 minately spreading. < 'onidiophoree either arising from Bubstratum directly or mostly 

 a- perpendicular branches of serial hyphse and ropes of hyphse 15-40/1 in length, 

 conidia! fructification varj ing from a Bingle chain to more or less complex penicillate 

 branching, mostly producing few chains of indefinite length and arrangemenl from 

 narrow tapering conidiiferous cells. Conidia pj riform tosubglobose, with basal collar, 

 9-10/', roughly tuberculate, white or slightly yellowish tinged, thick walled excepl at 

 the hase, the center of which remain- as a germ pore. ( lolonies rapidly liquefy sugar 

 gelatin with strong aminoniacal odor, and give an intensely alkaline reaction in litmus 

 media. Gives exactly the same reactions as /'. brevicaule Sacc. Differs from the 

 latter slightly, excepl in the color of the spore-. 



Common upon imported Camemberl cheese. Found often upon domestic Camem- 

 berl and grow.- very readily in cheese cellars, where it becomes a nuisance. 



