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CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 107 
ly more. These bear terminally a whorl of branched hy- 
phae. The hyphal branches of either the first or second 
series average 124 by 2. The conidial cluster is loose, and 
spreads out widely, averaging 100p to 350p by 354 to 70u 
(pl. 11, f. 1). The conidia are pointed oval in shape, 
varying from 3 to 4uin length, by 1.54 to 2p in diameter 
They are borne in simple chains of 40 to 80. They have 
a blue-green color, and contain a pigment soluble in hot 
alcohol, which does not change its blue-green color either 
by the addition of an acid or alkali. 
Penicillium roseum Link. 
A species of Penicillium which resembles Penicillium 
roseum Link was first found mingled with P. aureum. 
This fungus secretes a crimsonred pigment which discolors 
sapwood. The work of investigation is not completed, 
and it is thought best not to give further details concern- 
ing this fungus at present. A third species has not been 
identified. 
2. FUSARIUM. 
The species of Fusarium, identified as Pusarium roseum 
Link, was isolated from pink, red and violet blotches found 
on new pine lumber taken from lumber piles near Ashland, 
Wis., in 1905. This grew readily under artificial culture, and 
upon inoculation was found to be the cause of the blotches 
upon the lumber. The boards from which the original 
cultures were taken were sawn from trees of Pinus Strobus 
L., and P. resinosa Ait. Similar stains have been found 
on pine boards from the southern United States made from 
Pinus palustris Mill., and Pinus echinata Mill., also on 
pieces of wood from Pinus Virginiana Mill. 
This fungus, like other species of Fusarium that have 
been studied, varies in form, color, and babit of growth, 
depending upon the substratum upon which it grows. The 
