450 
C. H. CRABILL 
Petri Dish Culture: Starch Agar 
Mycelium pure white or pinkish until about the 5th day, when 
an olivaceous color begins to develop just inside the margin of the 
colony. Pycnidia multitudinous, small, prolific, uniformly distrib- 
uted over the colony, appearing 3 to 6 days after inoculation (Fig. 2). 
As the pycnidia develop, the olivaceous color is absorbed, so that the 
greenish zone near the margin of the colony is continually advancing. 
Fig. I. Strain I in about the 43d generation, 24 days old. The tardy pro- 
duction of relatively few large multilocular pycnidia is characteristic of this strain. 
A few young pycnidia have just appeared in this culture. 
Note: The photographed plates here figured may be located on the chart shown 
in Fig. 6 by sub-numbers which correspond to the numbers of the figures. 
For a year after isolation. Strain II was grown in test-tube cultures 
and transferred to fresh media every two months. At the end of 
that time plates of starch agar were center inoculated with it. 
Mycelium, as well as spores, was transferred. All of the colonies 
which developed showed fruiting and non-fruiting sectors. The 
fruiting sectors were in all respects typical of Strain II. The non- 
