272 BOTANICAL GAZETTE [OCTOBER 
(light umbrinus) center which spreads and becomes somewhat 
zonate by varying densities of color, the whole finally becomes 
powdery brown; reverse color brown to ferruginous; no coloration 
of the medium. Hyphae branched, septate, hyaline, 4-5 u broad. 
Conidiophores little differentiated from the mycelium, septate, once 

Fic. 11.—H ormodendron clados porioides 
: .@, 8, bh 
or twice branched, the last 
branching often being di- 
or trichotomous, each 
division bearing a long 
conidiiferous cell. Conidi- 
tferous cells flask-form, 30- 
40m long, often arising 
singly on simple side 
branches. Conidial fructi- 
fication either simple or 
clustered, each flask-shaped 
cell bearing a long chain of 
conidia. Conidia in chains 
up to 30, often connected 
by a neck, terminal conidia 
often larger, globular to 
lemon-form, 6~9 » in diam- 
eter, brown (light um- 
brinus), chains persistent. 
Pig. (13: 
On the ammonium nitrate 
media (nos. 1 and 2), this 
fungus developed differently in 
its general appearance. The 
mycelium often formed a cream 
colored, cheesy, irregular crust 
with a loose network of hyphae 
about the edges. This crust was finely zonate and had radiate grooves about 
the border. 
a powdery, 
formation. 
brown surface. 
Later, spores formed thickly over the surface of the crust, giving 
Abundance of moisture favored this cheesy 
STYSANUS STEMONITES (Pers.).—RABENHORST 37, 1°: fig. 3377 
OUDEMANS and Kontnc 29, pl. 29.—Mycelium at first white, 
