stalks is composed of a num- 
CHROMOGENIC FUNGI WHICH DISCOLOR woop. 83 tae 
PRIMARY CONIDIA. ; é 
After the primary conidia have been detached and sep- 
arated from the mucus there is in many species nothing to | a 
distinguish them from the secondary conidia. In fact, the .. 
real difference usually in the two forms is whether they ; . 
are borne on a single hypha, or on hyphae united in a 
stroma. The agglutinated cluster on a single stalk of one 
hypha éorteapands morphologically to the mucous-covered 
head (pl. 7, f. 2,5). The latter are more persistent, and 
retain the conidia for a much longer time. A secondary : 
growth of the stromata has been “noted in some species | : 
after the first spores have been formed, and have dropped : 
away, in which there are formed branches from the end of 
an old stalk, growing out | 
from the apex. (See figure ). 
Each of these subsidiary 
ber of parallel filaments, or 
hyphae, which in turn 
branch at the outer ends and 
form masses of conidia like 
the original head, only small- 
er. Such growths take 
place on rich, starchy media 
like cooked potatoes. On 
cultures on rice and potato 
an abortive type of stromata 
is often formed in the shape 
of somewhat flat, branching 
stalks, which grow much tall- 
er than the fruiting form, 
but bear no conidia. This 
abortive form resembles very 
much the original description 
of the sterile fungus Anthina Fr., which is probably a 
form of Graphium. 
G. EUMORPHUM, X 50. . 
Proliferation of stroma. a 
