Part 3, 1917] AGARICACEAE 
Stipe 2-3 mm. thick. 
Stipe brownish, solid. 
Stipe isabelline, hollow. 
Pileus 2.5-5 cm. broad. 
Surface glabrous. 
Stipe 2-5 mm. thick. 
Context decidedly bitter, becoming farinaceous. 
Context not bitter. 
Stipe 13-15 mm. thick. 
Surface decorated with appressed, clay-brown scales. 
Pileus 5-10 cm. broad. 
Stipe white. 
Stipe pale-tawny. 
Pileus umbrinous, brown, or blackish-brown, at least when moist, often 
paler on drying, mostly. 1—2 cm. broad. 
Surface velvety-tomentose. 
Surface glabrous or nearly so. 
Bree occas on the ground in woods; pileus reaching 3.5 em. 
road. 
Species occurring in swamps or marshy ground; pileus reaching 
2.5 cm. broad. 
Species occurring on dead wood in woods. 
Stipe reaching 2-2.5 cm. long. 
Pileus 1 em. broad. 
Pileus 2—2.5 cm. broad. 
Stipe reaching 5 cm. long. 
Pileus umbonate, margin striate. 
Pileus not as above. 
II. 
Pileus whitish, tinged with yellow when young; spores very large, 15 X 
Pileus cream-colored or isabelline, rarely darker on the margin. 
Pileus 1-1.5 em. broad. 
Surface finely whitish-pubescent. 
Surface glabrous. 
Pileus not umbonate. 
Pileus conspicuously umbonate. 
Pileus 2—3.5 cm. broad. 
Stipe 1-1.5 em. long. 
Stipe 3-5 cm. long. 
Margin of pileus brown. 
Margin of pileus concolorous, isabelline. 
Margin of pileus striate. 
Margin of pileus not striate. 
Stipe 6-8 cm. long. 
Pileus fulvous or ferruginous, sometimes fading with age or on drying. 
Surface hispid-squamulose, pale-fulvous. 
Surface glabrous. : 
Stipe 1.5-2 cm. long. 
Stipe 4-9 em. long. 
Pileus umbonate; stipe long-radicate. 
Pileus not umbonate; stipe not radicate. 
Pileus brown and striatulate when moist, buff-yellow when dry. 
Pileus bay or wine-colored. 
Surface glabrous. 
Pileus bay. 
Pileus wine-colored. 
Surface hispid-squamulose. 
III. 
Pileus white or whitish. 
Surface glabrous. 
Pileus convex, 1 em. broad. 
Pileus umbonate, 2.5 cm. broad. 
Surface papulose; pileus 2.5-5 cm. broad. 
Pileus dull-olivaceous, 1 cm. broad. 
Pileus testaceous with bay umbo, 7 mm. broad. 
Pileus vinosous, 6-8 mm. broad. 
Pileus ochraceous, isabelline, or fulvous, sometimes differently colored 
on the disk. . 
Pileus 0.7—1.5 cm. broad. 
Surface glabrous. 
Surface innate-fibrillose. : 
Lamellae pale-ochraceous at maturity. 
Lamellae bay-fulvous at maturity. 
Surface hispid-squamulose. 
Pileus 2-5 cm. broad. 
31. 
32. 
33. 
34, 
SPECIES OCCURRING ON THE PACIFIC Coast 
35 
36. 
37. 
38. 
39. 
N 
N 
. N, striata. 
N 
N 
N 
171 
. N. Curcuma. 
« N. pennsylvanica. 
. amara, 
. semiorbicularis, 
. paludosella. 
. argillosa, 
. Sovoria, 
. N. velutina, 
. Ny, pruinatipes. 
30, 
N. pallidomarginata, 
N. umbriniceps. 
N. serrulata, 
N. 
. lignicola. 
N. firma. 
. N, platysperma, 
N. pubescens. 
N., tubariiformis. 
N. mammillate. 
N. caespitosa, 
. NV, brunneimarginata. 
. N. Harperi. 
. N. Patiersonae. 
. N. washingtonensis. 
. N. pennsylvanica. 
. N. californica, 
. N. radicata. 
. N. semiorbicularis, 
. N. pallidomarginata. 
. N. sphagnorum. 
. N. vinicolor. 
. N. badia, 
SPECIES OCCURRING IN TROPICAL NoRTH AMERICA 
. N. tepeitensis, 
. N. jalapensis, 
. N. papularis. 
. N. subolivacea. 
. N. pellucida. 
. N. oinodes. 
. N. hepaticicola, 
. N. cyathicola. 
. N. corticola, 
. N. mexicana. 
