PENICILLIUM NO. 28. 



77 



X? 



i I Ml I! \l. LATA. 



Color deep 'lull green; reverse cream, or Blight traces of pink or violet; color in 

 media, none. 



( (dor, aone. 



Fifteen per cen! gelatin in water, .-low but typical; liquefaction, rather slow and 

 variable; litmus reaction, acid. Potato and beau agar and potato plugs, typical, 

 producing a very heavy layer of dark-green conidia when cane Bugar is added. Etau- 

 1 in's fluid, typical. Cohn's solution, germination only. 



Synthetic fluid (Dox'g . carbon supplied as: Cane sugar, grows well up to 50 per 

 cent solution with acid reaction. Lactose 3 percent, weak growth. Levulose 3 per 

 cent, tj pical. < rlycerin 3 per cent . 

 half normal growth. Potato starch .'r-?' 

 :'. per cent, typical. Butterfat, rich 

 growth. 



Milk, colonies crow verj slowly; 

 curdling (0.25 per cent calcium 

 chloric! added i very Blow; digestion, 

 very slight ; color, none. 



At :i7° C crew hotter than chock 

 at 20° C. 



PENICILLIUM No. 28. 



Colonies upon sugar gelatin and 

 potato or bean agar, gray-green with 

 broad white border when growing, 

 floccose, tangled tufts of hyphse 

 and rope- of hvph;e spreading inde- 

 terminately upon the substratum, 

 i -e j ellow or tan on media con- 

 taining sugar, conidiophorea arising 

 direct from the substratum as short 

 lateral branches from 38 L60ju in 

 length, '.'>». in diameter, swelling to 



5/i at apex, from aerial hyphse or ropes of hyphse. Conidial fructification a simple 

 column. :!()()/( or even ">(>(>" in length by 10-15/i in diameter, produced from a single 

 whorl of conidiiferous cells at the apex of the conidiophore. Conidia elliptical to 

 globose, 2 3/zor2 2.4/1 by 3 3.3/i in diameter, light yellowish green in mass, smooth. 

 Colonic- liquefy Bugar gelatin. Litmus reaction strongly acid. 



(irow - readily upon all common media. 



Pound at Storrs, I onn . upon decaying mushroom. Very characteristic and read- 

 ily recognized from others with related morphology. 



H 



I'n,. 33.— Penicillium No. 28: n, b, conidial fructifications 

 each a single verticil (X 900); g, h, j. sketches of conidio- 

 phores and fructification (X 140); /.', tip of conidiophore, 

 swollen at apex, bases of lowesl two conidiiferous colls 

 (X L,600 . 



i l III RAL OATA. 



Color gray-green; reverse yellow, or tan when sugar is present; color in i lia, 



more or less yellow, according to media. 



Fifteen per cenl gelatin in water, good growth, (dear croon; liquefaction Blow — 2 

 weeks or more; litmus reaction acid. Potato agar, typical growth, acid reactions. 

 Bean agar, typical growth, acid reactions. Raulin's Quid, good growth, edges pink, 

 fluid brownish fluorescent. Cohn's solution, weak growth. 



Synthetic fluid (Dox's), carbon supplied as: Cane .-near, good growth up to 50 

 percent, acid reaction. Lactose 3 per cent, slow hut fairly typical growth. Lactic 



