156 REVISION OF THE NORTH AMERICAN HYDNACEAE 
seem to be accounted for by the fact that the plant was old and 
dead when collected. 
5. Hydnellum scrobiculatum (Fries) | 
Hydnum scrobiculatum Fries, Obs. Myc. 1: 143. 1815. 
Plants terrestrial, mesopodous, gregarious, usually more or 
less confluent in masses, brown throughout ; pileus subregular to 
irregular, expanded, obconic, subplane, somewhat depressed or 
rarely subconvex, 2—4 cm. wide, by confluence becoming 10 cm. 
wide ; surface densely woolly or velvety pubescent, uneven, rugose, 
often colliculose and complicated by pileoli, cinnamon-brown, 
changeable with the light, becoming permanently dark if bruised 
or dipped in water which mats down the pubescence, sometimes 
obscurely zonate ; margin repand, straight, obtuse, sterile, lighter 
than disk, this is more apparent if the plant be dipped in water; 
substance tough, fibrous, soft and spongy toward the upper part of 
pileus, more compact in lower part and center of stem, trans- 
versely zonate, dark brown, hygrophanous so that the juice may 
be squeezed out in drops, juice watery with a slight pinkish tinge ; 
stem slender, surrounded nearly or quite to the pileus by a large 
mass of spongy hygrophanous tomentum which is confluent with 
adjoining masses, surface woolly pubescent concolorous with pileus 
becoming dark when bruised or wet, stem near pileus 5-8 mm. 
wide, 5 mm. or less long to the spongy base, base 1—2 cm. wide, 
stem including base 2-4 cm. long; teeth slender, terete, sub- 
cylindrical, straight, uniform in length, shortening toward margin 
and stem, occasionally somewhat decurrent, brown with light 
tips, puberulent, do not change color or become wet when dipped 
m water, darkening some when bruised, 3 mm. and less long, 
crowded, about 3 to one millimeter; spores brown, subglobose, 
tuberculate, uniguttulate, 3.5 wide ; taste disagreeable but not 
acrid ; odor of rotten wood, not strong. 
Нав.: On ground in dark, damp woods. Aug. 
| Rance; New York, Banker. Other collections referred here 
with some doubt owing to the lack of data as to living characters, are 
as follows: New York, Cushier, Peck ; South Carolina, Ravenel, 
Kentucky, Morgan , Tennessee, Murrill. Besides these there are 
a large number of collections which may belong here in part and 
ш part should be referred to H. sanguinarium or Н. concrescens 
e possibly represent some other related species. But to diagnose 
t "us forms without knowing the living characters of the plants 15 
mainly guess work, Only ап expert thoroughly familiar with the 
