AMERICAN WOOD-PRESERVERS' ASSOCIATION 13 



wood destroying but quite slow in its action. The above mentioned 

 ties had been in storage several years. New pine ties bearing an 

 abundance of the fruiting-bodies showed no perceptible effect on the 

 fiber. 



In the opinion of the writer the fungus need not be discriminated 

 against, as the rot will not develop to any serious extent within normal 

 periods of storage. 



LENZITES BETULINA 

 (Plate II, Fig. 3; Plate IV, Figs. 5 and 6) 



This is one of the corky, flexible, shelving species which project 

 out one to three inches. The individual fruiting-bodies are borne one 

 above the other, often in large, conspicuous clusters. The upper surface 

 is velvety to the touch, usually clay colored to light brown, and often 

 concentrically banded with yellow or orange shades. The young plants 

 and growing margins are usually buff colored. The under surface con- 

 sists of coarse gills radiating out to the margin. These are whitish 

 to light buff in color. 



This fungus occurs in all parts of the United States, and is likely 

 to attack almost any hardwood. In the less durable woods, such as 

 red oak, red gum, etc., it produces a marked uniform bleaching and 

 rot of the heart as well as the sap. The fungus is a rapid grower 

 and very destructive. 



LENZITES SEPIARIA 

 (Plate I, Fig. 4; Plate V, Figs. 1 and 2) 



Lenzites sepiaria is a shelving, tough, flexible fungus varying from 

 russet to dark brown above and paler beneath. The upper surface is 

 usually densely clothed with hairs, but in age these may be more or 

 less weathered away. The underside consists of plates or gills radiating 

 out from the point of attachment. 



This fungus is widespread and common on coniferous timber over 

 the entire United States. There are several closely related species in 

 different parts of the country, but they are all brown and attack wood 

 severely. One species (Lenzites imbed) rots hardwoods, but the others 

 all grow on conifers. 



LENZITES TRABEA 

 (Plate VIII, Fig. 5) 



This fungus is closely related to Lenzites sepiaria, but principally 

 rots hardwood timber. It is moderately thin and shelving, and often 

 loosely clustered. It differs from Lenzites sepiaria in being more of 

 a cinnamon brown than sepia or dark brown, in the upper surface 

 being usually devoid of a velvety covering, and in the underside being 

 provided with gills which are closer together and which frequently 

 join laterally (anastomose) to form elongate pores. 



