88 MISSOURI BOTANICAL GARDEN. 
y unlike Sporotrichum, on simple erect not prostrate hyphae. 
This stage nevertheless is apparently identical with Sporo- 
trichum vellereum Sacc. and Speg. var. grisea Boul. 
a - 2 
PRIMARY CONIDIA. 
TT? ey ee, Oe eee Se ree 
The primary conidia are borne on branching hyphae in 
stalked heads (pl. 7, f. 5), and average 7.74 by 3.4. 
They are of a light green or yellow tint, and are identical 
in shape and appearance with the secondary conidia. 
ee ees 
Graphium atrovirens n. sp. 
C% In addition to Graphium smaragdinum on the red gum 
wood a new species was found present in a number of 
instances. This discolored the wood with a brown stain, 
; similar to the latter species, and at first was not distin- 
| guished from it, having the same color and appearance in 
mass; but after a more careful study of the colonies on 
agar, different forms of secondary conidia were found 
pres“nt in two types of colonies, making it necessary to 
separate this form from G. smaragdinum and giving good 
* reasons to call it a different species. It is now named 
| Graphium atrovirens with the following as its cultural 
characters :— 
MYCELIUM. 
The growth of the colonies on agar plates is fluffy, as 
compared with that of G. smaragdinum. This is due to the 
formation of strands in the mycelium by the union of a 
‘a number of parallel filaments, these growing upward and 
often forming large branching masses, similar to those 
formed by the mycelium of some species of Cerastosto- 
mella. The filaments of the mycelium are hyaline at first, 
later changing to dark green or olive, in the vicinity of the 
stromata or heads. They measure 3u to 4” in diameter. 
Those which unite to form the stroma usually measure but 
FOOT Ra, a EPP PRP ME MOR eS Ree is ee AN Oa wy ae gt ge. cig oe 7 ron ee ee 
