236 Transactions British Mycological Soctety. 
C. Piceae in artificial media. On the spruce a rather small 
mycelium is produced and it does not penetrate very far into 
the wood. It is white or slightly greenish in colour and produces 
on the surface the same conidial forms and perithecia as in 
artificial culture. The Graphia are extremely numerous, but 
the perithecia vary in number, sometimes studding the wood 
closely, sometimes appearing singly here and there among the 
Graphia. 
SUMMARY. 
In my investigation of Cevatostomella Piceae Miinch, my 
results are similar to those of Miinch, that is that Graphium 
penicillioides Corda must be considered a stage in the life- 
history of Ceratostomella Piceae. 
BIBLIOGRAPHY. 
(1) Hartic, R.—Lehrbuch der Pflanzenkrankheiten, pp. 75 and 106, 1900. 
(2) Hepecocx, G. G.—Studies upon some Chromogenic Fungi which dis- 
colour wood. Missouri Botanical Garden. Seventeenth Annual Report, 
St Louis, 1906. 
(3) Husert, E. E.—Notes on Sap-stain Fungi. Phytopathology, 11 (1921). 
(4) Mtncu, E.—Die Blaufaule des Nadelholzes in Naturwissenschaftlichen 
Zeitschrift fiir Forst und Landwirtschaft, 1907-1908. 
(5) SAccaRDo, P. A.—Michelia, I. p. 370, 1878. Sylloge Fungorum, I—XvIiI. 
(6) Von ScHRENK, H.—The “blueing”’ and the red rot of the Yellow Western 
Pine. U.S. Dept. of Agriculture, Bureau of Plant Industry Bulletin, 
No. 36, Washington, 1903. 
DESCRIPTION OF PLATES. 
Plate VIII. Photograph of transverse section of the trunk of a freshly felled 
tree of Pinus sylvestvis showing sap-wood stained deep blue—in places 
nearly black—by a mixed infection of fungi. 
Plate IX. Fig. 1. Section of sap-wood of Plate VIII showing brown hyphae of 
fungi running along tracheides and filling medullary rays. x 8oo. 
Wide hyphae are often found where cells of medullary ray are 
destroyed. 
Figs. 2-7. Ceratostomella Piceae. 
Fig. 2. (a) Mycelium from germinating ascospore showing conidio- 
phore of usual Cladosporium type. x 400. (b), (c), (@) Conidia from 
hanging drops of weak pine and spruce decoction. 
Fig. 3. Row of beaded mycelial cells from which young Graphia 
arise, the mooring hyphae are conspicuously brown in the more 
or less colourless mycelium, 
Fig. 4. A group of Graphia. x25. 
Fig. 5. Base of a young Graphium. 7 
Fig. 6. Tip of Graphium before production of the drop. x 150. 
Fig. 7 (a) The perithecium. x65. 
(6) Wall of ascus. x 650. 
(c) Ascospores. x 500. 
