Banker: Type Studies in the Hydnaceae 
13 
Sarcodon acre Quelet, Ench. Fung. i88. 1886 
Hydnuni acre Quelet, Bull. Soc. Bot. France 24: 324. pi. 6. f. i. 
1877- 
Hydnum cristatum Bres. Atkinson, Jour. Myc. 8: 119. 1902. 
The type of H. acre Quel, has not been seen. A specimen, how- 
ever, has been received from G. Bresadola which that eminent 
mycologist had compared with Quelet’s type and regards as an 
authentic representative of the species. This specimen does not 
appear to me to differ in any respect from authentic specimens of 
Hydnum cristatum Bres., received from Professor George F. 
Atkinson, which are a part of the type collection. The acrid taste 
noted in both the European and the American plants confirms the 
diagnosis of their identity, as this character is not common in the 
Sarcodons. A specimen at Kew contributed by Quelet has all the 
characters of our American forms. There seems to be no good 
reason to maintain H. cristatum Bres. as a distinct species. 
The plant appears to be most abundant in Connecticut and 
Long Island. 
Sarcodon radicatus sp. nov. 
Sarcodon fuligineo-violaceus Banker, Mem. Torrey Club 12 ; 142. 
1906; not Sarcodon fuligineo-violaceus (Kalch.) Quel. Ench. 
Fung. 189. 1886. 
Hymenophore terrestrial, mesopodous, gregarious, small, 3-4 
cm. high, brownish; pileus subconvex, uneven, somewhat irregu- 
lar, 4-6 cm. wide ; margin thin, sterile, decurved ; surface subpu- 
bescent to smooth, sometimes with small innate scales, light-brown 
or ochraceous-brown with darker areas ; substance fleshy, some- 
what tough, light-brown, lighter than the surface ; stem sub- 
flexuose, somewhat inclined, excentric to central, solid, subeven, 
abruptly narrowing below to a slender root-like base, 2-2.5 cm. 
long, 1-1.5 cm. wide; teeth fine, terete, tapering, decurrent more 
or less scatteringly to the base, seal-brown to flesh color at the 
tips, when dry a uniform tawny-brown, short teeth scattered about 
among the long, 1.5-2 mm. long, 0.1-0.2 mm. wide, 9-12 to a 
square mm.; spores subglobose, tuberculate, 4-5.5 /a wide, brown; 
hyphae of trama hyaline, smooth, thin-walled, collapsing when 
dried, recovering slightly in KOH, forming an intricate tangle, 
scarcely separable in KOH, septate, without clamp-connections, 
segments irregular, more or less inflated, 9-12 /x wide, 40 /x or more 
long ; taste mild ; odor of slippery elm. 
