Part 2, 1917] AGARICACEAE 79 
young, dull-white or yellowish-white when old, margin concolorous, undulate; context white, 
with a very decided mephitic or garlic odor and taste; lamellae sinuate, subdistant, broad, 
slightly serrate on the edges, white, becoming rose-colored at maturity; spores angular, rose- 
colored, uniguttulate, 9 X 7 u; stipe short, subcylindric, very eccentric, solid, pruinose, white, 
1-1.5 cm. long, 4-6 mm. thick. 
Type LocaLity: Minnehaha Park, Minneapolis, Minnesota. 
Hastrat: On fallen dead branches. 
DistTRIBUTION: Known only from the type locality. 
5. Claudopus subnidulans Overholts, Ann. Mo. Bot. Gard. 3: 195. 
1916. 
Pileus sessile, reniform or dimidiate in outline, convex, 0.5-2 em. broad; surface dry, 
fibrillose-tomentose, bright-tawny-orange, margin inrolled, even or slightly striate; context 
thin, white, the odor and taste none; lamellae radiating from the point of attachment to the 
pileus, of medium distance, rather broad, 3-5 mm., salmon-colored or dull-orange; spores 
globose, smooth salmon-colored, 5-7 y; stipe none, the pileus attached by a white, tomentose 
base. 
TYPE LocaLity: Jefferson Barracks, near St. Louis, Missouri. 
Hasrrat: On rotten logs in damp woods. 
DisTRIBUTION: Known only from the type locality. 
6. Claudopus nidulans (Pers.) P. Karst. Bidr. Finl. Nat. Folk 
32: 288. 1879. 
Agaricus nidulans Pers. Ic. Descr. Fung. 19. 1798. 
Agaricus dorsalis Bosc, Ges. Nat. Freunde Berlin Mag. 5: 85. 1811. 
Pileus sessile or narrowed to a very short stipe, reniform to circular, usually imbricate, 
reaching 5 cm. or more broad; surface dry, tomentose or somewhat hirsute, bright-yellow, 
margin involute; context slightly tough; spores minute and very peculiar, resembling some 
bacteria, curved-rod-shaped, smooth, rose-colored in mass, 3~5 X 1 uy. 
TYPE LocaLity: Europe. . 
Hastrat: On decaying wood of both deciduous and coniferous trees. 
DIstRiBUTION: Canada to Florida and west to Oregon; also in Europe. 
InL,ustrations: Atk. Stud. Am. Fungi ed. 1. f. 141; ed. 2. f. 144; Ges. Nat. Freunde Berlin 
Mag. 5: £1. 4; Mycologia 6: pl. 113, f. 6; Pers. Ic. Deser. Fung. 1. 6, f. 4 
f. 4. 
Exsiccatr: Ellis, N. Am. Fungi 913 (as Panus dorsalis); Rav. Fungi Am. 103; Rav. Fungi 
Car. 1:5 (as Panus foetens); 2: 13; Roum. Fungi Sel. 6769. 
7. Claudopus avellaneus Murrill, sp. nov. 
Pileus thin, very eccentric, convex, depressed behind, gregarious, 1 cm. broad; surface 
smooth, finely tomentose, pale-avellaneous, margin very thin, concolorous, inflexed; lamellae 
aduate, broad, distant, white to salmon-colored, entire and concolorous on the edges; spores 
ovoid, irregular, angular, apictlate, uniguttulate, rose-colored, 8-10 X 5-6; stipe short, 
much enlarged above, smooth, grayish, densely tomentose, about 5 mm. long, 1-2 mm. thick. 
Type collected on dead wood at Glen Brook, Oregon, November 7, 1911, W. A. Murrill 779 
(herb. N. Y. Bot. Gard.). . 
DISTRIBUTION: Known only from the type locality. 
8. Claudopus greigensis (Peck) Sacc. Syll. Fung. 5: 735. 1887. 
Agaricus greigensis Peck, Ann. Rep. N. Y. State Mus. 24: 69. 1872. 
Pileus very thin, convex, 1-2 cm. broad; surface hygrophanous, grayish-cinnamon and 
striatulate wityn moist, silky-fibrillose when dry; lamellae subdistant, scarcely reaching the 
stipe, grayish, becoming dingy-pink; spores angular, usually containing a single large nucleus, 
8.5-11 X 7.5 uw; stipe short, solid, curved, fibrillose below, with an abundant white, radiating 
mycelium at the base, about 2 mm. long. 
Type LOCALITY: Greig, New York. 
Hasrrat: On much decayed wood. 
DIstRIBUTION: New York. 
