28 



dying, the most vital appearing green in their upper parts only. 

 The largest trunk measured 7 feet 6 inches in circumference 

 close to the base and 6 feet 9 inches a foot above the ground. 



Of the localities mentioned by Torrey (1842) that at Hemp- 

 stead is probably now reduced to the two companion trees at 

 Rockville Center on the stream flowing south from Hempstead, 

 which was dammed and excavated over thirty years ago, I am 

 told, to form the Hempstead reservoir and associated ponds. 



Wherever Torrey's Rockaway station may have been, there 

 can be little doubt that it no longer exists. 

 New York, December, 1907. 



A KEY TO THE WHITE AND BRIGHT-COLORED 



SESSILE POLYPOREAE OF TEMPERATE 



NORTH AMERICA. — II 



By William A. Murrill 



G. The Species of Tyromyces 



1. Pileus large, 8 cm. or more in diameter. 2 

 Pileus small, 5 cm. or less in diameter. 6 



2. Tubes less than 5 mm. long. 3 

 Tubes more than 5 mm. long. S 



3. Surface of pileus marked with circular depressed spots. 



T. guttulatus (Peck) Murrill 

 Surface of pileus not guttulate. 4 



4. Pileus over 1 cm. thick. T. pahisiris (B. & C.) Murrill 

 Pileus less than 5 mm. thick. T. obductus (Berk.) Murrill 



5. Pileus verv smooth, becoming dark sordid-bay on drying. T. Smallii Murrill 

 Pileus rough, sodden, white, becoming blackish, especially at the margin. 



T. Spraguei (B. & C.) Murrill 

 Pileus tuberculosa, ochraceous, not becoming blackish. T. tiliophila Murrill 



6. Pileus resinous or cartilaginous in appearance. 7 

 Pileus neither resinous nor cartilaginous. 8 



7. Tubes .sharply and deeply lacerate. T. cerifluus (B. & C.) Murrill 

 Tubes slightly dentate. 7^ semisupimis (B. & C. ) Murrill 



8. Tubes large, irregular, lacerate, 1-2 to a mm. T. undosus (Peck) Murrill 

 Tubes much smaller, u.sually regular and entire. 9 



9. Surface zonate. lo 

 Surface azonate. 1 1 



ID. Pileus 1-3 mm. thick, not effused. 7\ crispellus (Peck) Murrill 



Pileus 5 mm. or more thick, effused-reflexed 7'. Ellisiamis Murrill 



II. Surface conspicuou.sly villose or tomenlose. 12 



Surface glabrous or nearly so. 13 



