230 MURKILL : POLYPORACEAE OF NORTH AMERICA 



horny substance extending from the stipe to the margin in a tree- 

 like fashion : tubes plainly though unevenly stratified, 2-4 mm. 

 long each season, 4-5 to a mm., grayish-brown within, mouths 

 circular, white or very pale yellow, dissepiments thick, obtuse, 

 entire : spores broadly ovoid with attenuate base, light yellowish- 

 brown, smooth, 3.5 X ^iJ.: stipe lateral, i x i cm., cylindrical, 

 equal, glabrous, shining black to dull brown, with substance like 

 the context, apparently absorbed or overgrown as the pileus 

 enlarges. 



This very distinct and easily recognized species was collected 

 by C. L. Smith and B. Shimek in Nicaragua during the winter of 

 1891-92. Its conspicuous varnished surface and lateral stipe sug- 

 gest at once the genus Ganoderma, but more important characters 

 connect it with Fonics and I have with some hesitation assigned it 

 to this genus, recalling the fact that Fomes ungulatus often has 

 considerable varnish on its surface and that an umbo often has its 

 beginning in a reduced stipe. 



8. Fomes Ohiensis (Berk.) 

 Trametcs Ohiensis Berk. Grevillea, i : 66. 1872. 

 This plant is unusually small for the genus Fomes, making 

 with F. sciitellatiis a rather distinct subgroup. It grows upon rails 

 and dead branches of various deciduous trees. Among collections 

 examined are those from Canada (Dearness), Kansas (Cragin), 

 Michigan (Dennen), Ohio (James), New York (Peck). 



9. Fomes scutellatus (Schw.) Cooke 



Polyponis scutellatus Schw. Trans. Am. Phil. Soc. 4: 157. 

 1832. 



Fomes sc2itellatus Cookt, Grevillea, 14: 19. 1885. 



This minute species was described by Schweinitz from material 

 collected on Syringa in Pennsylvania. It has since been found 

 on alder, witch hazel, sweet gum and other deciduous shrubs and 

 trees. Some of the collections examined are as follows : Penn- 

 sylvania (Everhart), Florida (Calkins), Maine (Harvey, Blake), 

 Canada (Macoun), Delaware (Commons), Ohio (James), Alabama 

 (Mell). 



10. Fomes Laricis (Jacq.) 



Boletus Laricis Jacq. Miscel. i : 164-203. pi. 20-21. \J'J^. 

 Bull. Herb. France, pi. 2g6. 1786. 



