eee, ere ae 
fn * 
See 
68 MISSOURI BOTANICAL GARDEN. 
size in so far as the colonies and perithecia are concerned ; 
but on the other hand, both the conidia and ascospores are 
constantly much smaller. In nature, the perithecia that 
mature are often surrounded by several closely adhering 
dark bodies, which are either sclerotia or abortive peri- 
thecia, apparently the latter. This feature has never been 
noted with other species of Ceratostomella. In view of 
the differences, it is thought best to separate this form 
from C. pilifera and it is named C. Schrenkiana, in 
honor of Doctor von Schrenk, who first collected the 
fungus and noted its peculiarities. 
The following cultural characters are taken from a large 
number of natural and artificial cultures : — 
MYCELIUM. 
Conidia or  asco- 
v " . p spores, if sown on agar 
VV RAY plate cultures, germi- 
- Te fz nate in a few hours, 
and after a day have 
formed conidia, if the 
temperature is favora- 
\ ( ble. The most favora- 
A! V ble temperature for 
W tA growth is 80° to 90° 
NU F. The filaments and 
hyphae remain white 
ae for several days, and 
often become massed 
in a furry outgrowth in 
ments unite into upright 
As clusters or false heads. 
Pc LNA «(See figure). After a 
~~ few days’ growth, por- 
which strands of fila-— 
C. SCHRENKIANA, X 50. 
Dendroid fruiting tuft. 
tions of the mycelium 
lying next the agar 
become pigmented with a brown color, and rapidly develop 
Ss Ra ar) 
