CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 95 
from the previous species was found on discolored boards 
made from the white pine, Pinus Strobus L. This stained 
the wood a light brown color, less intense than that made 
by any other species of Graphium investigated, with the 
exception of G. ewmorphum. The constant presence of 
short chains in the formation of the secondary conidia was 
a character that needed the most careful verification, since 
it was possible that an admixture of Ceratostomella with 
the Graphium had taken place. This form of conidia was 
accepted as a fact only after careful study for six months, 
with repeated dilution culturesof both primary and second- 
ary conidia in numerous agar poured plates and test tube 
cultures. ‘ 
Another difficulty lay in the resemblance of the fungus 
to species of Stilbuwm, the stroma in its earliest stages . 
being identical with species of this genus, owing to the ab- 
sence of color. The same difficulty is to be found with 
others of the species studied. This indicates that the sep- 
aration of Graphium from. Stilbum on a color basis is not 
a good one, and that there is no good dividing line between 
the two genera. Should it be found that species of Stil- 
bum have secondary conidia similar to those of Graphium, 
a better basis for generic separation would be found in the 
types of such conidia. 
The following are the cultural characters of this species 
which is now named Graphium aureum:— 
MYcELIUM. 
In colonies grown on agar plates either from primary or 
secondary conidia there appear in two or three days second- 
ary conidia borne singly or in branched chains from simple, 
erect conidiophores. These conidia are like those of Sporo- 
trichum and of Ceratostomella. The mycelium is hyaline 
at first, changing to yellow, then to light brown. The fila- 
ments measure from 2# to 3u in diameter. 
