178 REVISION ОЕ THE NORTH AMERICAN HyDNACEAE 
ble ; teeth slender, terete, tapering ; spores ovoid, white, more or 
less guttulate, minutely papillose. 
The genus is monotypic. In color, consistency and spore 
characters it shows considerable affinity with Zeaza, but shows 
no indication whatever of the branching peculiar to that genus. 
I. AURISCALPIUM AURISCALPIUM (L.) S. Е. Gray, Nat. Arr. Brit. 
РЕЖ: 650: 182t 
Hydnum Auriscalpium L. Sp. Pl. 2: 1178. 1753. 
Auriscalpium vulgare Karsten, Medd. Soc. Faun. et Fl. Fenn. 
в: 27. 1870. : 
Pleurodon Auriscalpium Karsten, Rev. Myc. 3:20. 1881; 
Leptodon Auriscalpium Quélet, Ench. Fung. 192. 1886. 
Plants small, pleuropodous, dark brown, г-6 cm. high; pileus, 
horizontal, subcordate to reniform, convex to subplane, о.5-2.5 cm. 
wide ; surface hirsute or subglabrous in age, brown to blackish ; 
margin strigose, hairy, fimbriate, fertile; stem vertical, slender, 
terete, solid, bulbous at base, attenuate upward and passing through 
the sinus of the pileus bends over adnate to the upper surface as a 
ridge to near the center, hirsute-tomentose, spongy at base, dark 
brown, darker than pileus, 1-6 cm. long, 1-3 mm. wide ; substance 
tough, flexible, light brown; teeth slender, terete, tapering, acute, 
light brown to grayish-white from the spores, 0.5-2 mm. long, 
. 15 mm. wide, not decurrent; spores ovoid to subglobose, 
minutely papillose, often guttulate, white or hyaline, 4.5 by 5-6 /. 
Нав. : On decaying cones of conifers. June-Nov. 
RANGE: Maine, Ricker; Massachusetts, Clark ; Minnesota, 
Holway : Iowa, Macbride ; Arizona, Griffiths & Thornber у Ore- 
gon, Szveerser. 
Exsicc.: M. C. Cooke, F ung. Brit, 306; Desmaziéres, Pl. 
Crypt de Ег., 954; De Thumen, Myc. Univ., 1106; Rabenhorst, 
Fung. Europ., 17; Roumeguére, Fung. Select., 6935; Ellis & 
Everhart, Fung. Columb. Cont. by С. L. Shear, 1408; Cavara, 
Fung. Longob., 106; Mougeot & Nestler, Stirp. Crypt. Vog. 
Rhen., 777; Ellis & Everhart, М. Am. Fung. 2d. Ser., 2511. 
The Species is also European and through all its widéspread 
distribution maintains а remarkable constancy of character and is 
one of the most readily recognized species in the family. 
In one set of Desmazieres Pl. Crypt. de France 954 the speci- 
mens showed normal plants apparently growing from the stipe of an- 
