208 YEASTS AND MOLDS 
DD. Without ammoniacal odor. 
E,. With yellow coloration of liquefied gelatin (not of 
mycelium in reverse). 
1. Colonies small, conidiophores 100-150 mi- 
crons in length ..................... P. citrinum 
2. Colonies broadly spreading conidiophores 
250-300 microns................ 0000. P. chrysogenum 
EE. Without yellow color in liquefied medium (or slight traces 
only). 
e. Colonies white or pink or salmon............... P. roseum 
ee. Colonies some shade of green. 
f. Colonies floccose, margin spreading by stolons... .P. stoloniferum 
jf. Colonies velvety surface growth of fruiting hyphe 
only. 
g. Conidiophores very short (100-200 microns). 
a P. No. 12 
Dec cece cece nce teen eee ee en eeeeeenes P. No. 37 
gg. Conidiophores longer (200-400 microns): 
1. Conidiophores variously branched, reverse 
always colorless. ...........0..00eceeeee P. No. 24 
2. Conidiophores each with a verticle of branches— 
each branch wearing a columnar fructification 
—reverse and medium darkening in sugar 
10 0 P. atramentosum 
CC. Liquefaction of gelatin none or slower than 10-12 days, 
or only partial. 
h. Colonies yellowish brown spores elliptical........ P. divaricatum 
hh. Colonies white to lilac, liquefier, 14-16 days..... P. lilacinum 
hhh. Colonies floccose or creamy white: 
1. Conidiophores Jong, typical penicillate 
branching.............0... 0.000.000, P.camembertivar. 
rogeri 
2. Conidial chains borne upon short branches 
of floccose hyphe................... P. No, 33 
GG. Colonies some shade of green. 
H. Surface with hyphe definitely in ropes or trailing, 
bearing numerous conidiophores, as short 
branches distinctly traceable to their origin in 
such hyphe. 
t. Colonies usually red below and reddening the 
substratum. 
1. Fruiting areas dark green............ P. funiculosum 
2. Fruiting areas mixed yellow and green.P. pinophilum 
~ 
