CHROMOGENIC FUNGI WHICH DISCOLOR woop. 89 
2u in diameter. The color of the stroma is dark green to 
black when mature, but in growing colonies all variations 
between hyaline and dark green may be found. The 
stalks measure from 1.5 mm, to 3 mm. in height, and 8u 
to 80u in diameter, being proportionately more slender 
than those of every other species of Graphium described 
inthis paper (pl. 8,f. 1). In this species, as in others, all 
the forms of gradation between a head with a stalk com- 
posed of one filament, and a stalk with many filaments may 
be found. The difference between those bearing secondary 
conidia and those bearing primary conidia consists mainly 
in the absence of color in hyphae bearing the former. 
SECONDARY CONIDIA. 
The secondary conidia are borne in simple open clusters, 
of the type of the conidia of Sporotrichum. They are 
borne either terminally or along the sides of lengthened 
hyphae (pl. 8, f. 2, 3). They are obovate to elliptical in 
shape, measuring 42 to 5.54 by 1.6 to Qu. They are 
hyaline, becoming guttulate when old. The clusters re- 
main open for a number of days after they are mature, but 
under very moist conditions fall together in rounded masses 
on the hyphae. The conidia of G'. smaragdinum fall to- 
gether as soon as mature, the clusters being much closer in 
their formation (pl. 9, f. 9). 
PRIMARY CONIDIA. 
The primary conidia are borne terminally on the ends of 
the branching hyphae in the stroma which form large, 
mucilaginous heads. These, without the sheath of mucus, 
are flattened oval in shape, (pl. 8, f. 1), white at first, 
later gray in color. They measure 40, to 600, in their 
greatest diameter, the latter being the measure of the 
head including the mucilaginous sheath. The primary 
conidia are hyaline, obovate to elliptical, and measure 
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