eae ag? te, 
ED Se Pa Le Re A Re ee Eee ee ee ae oe OUR? 
Fal ots Oe AP. By SP ng ee ; ae 
CHROMOGENIC FUNGI WHICH DISCOLOR WwoopD. 61 
ters, parallel cultures of related fungi have been grown on 
sets of the same media in conditions as nearly identical as 
can obtain in an ordinarily well-equipped bacteriological 
laboratory. In order to make drawings of the delicate coni- 
dial stages of some species it was often found necessary to 
grow the colonies in Petri dishes of thin glass, and study 
them in the open in the dish, without placing a cover glass 
over the very fragile hyphae. 
It is thought best to arrange the results under the fol- 
lowing groups or heads : — 
WOOD-STAINING FUNGI. 
I. Wood-bluing fungi. 
1. Ceratostomella. 
II. Wood-blackening and»wood-browning fungi. . 
1. Graphium. 
2. Hormodendron. 
3. Hormiscium. 
4. Other wood-blackening fungi. 
III. Wood-reddening fungi. 
1. Penicillium. 
2. Fusarium. 
In conclusion of these introductory remarks, grateful 
mention should be made of the valuable assistance to the 
work of investigation accruing through the use of the 
library and other facilities of the Missouri Botanical Gar- 
den, kindly tendered by Dr. William Trelease, the Direc- 
tor. Acknowledgment also should be made of the helpful 
co-operation of Dr. Hermann von Schrenk, Mr. Perley 
Spaulding and Miss Laura L. Eames, of the Mississippi 
Valley Laboratory, and to Dr. A. D. Hopkins, of the Bu- 
reau of Entomology of the United States Department of 
Acriculture, for securing material for study and granting 
other similar favors. 
I. WOOD-BLUING FUNGI. 
The blue stain in pine wood has been known in Europe for 
