320 C. H. Kauffman 



7. Pileus pinkish-cream color; stem subglabrous; annulus ample, su- 



perior, persistent L. McMurphyi Murrill 



8. Pileus, etc., white, 1-3.5 cm. subumbonate, glabrous, even; gills 



crowded, narrow; stem slender, 5-8 cm. x 3-5 mm; annulus api- 

 cal, membranous, at first erect; spores short-ellipsoid 5-7.5 x 3- 

 3.5 M (L. Candida Morg.) (L. albissima Murrill) . . .L. pulcherrima Graff 



8. Pileus not white 9 



9. Pileus delicately pink, 2-4 cm. subviscid, even; gills narrow; flesh 



white, unchanged; stem 5-9 cm. x 3-5 mm., glabrous, soft, stuffed, 

 annulus median; spores subacute at ends, ellipsoid, 5-6 x 3-4 /ji 



(L. delicata var. Kauff., Agar. Mich., I. 631) L. rubida, sp. nov. 



9. Pileus ochraceous-fulvous, 4-5 cm., radiate-wrinkled; gills broad; 

 flesh whitish, blackening at base of stem; stem equal, 8 cm. x 5-7 

 mm.; annulus oblique, black-scaly; blackish fibrils appendiculate 

 on margin of pileus; spores 5-6 x 3-4 /jl. .L. demisannula Secr.-Ricken 



III. PRUINOSAE 



1. Spores averaging 9 m or more in length 2 



1. Spores averaging less than 8 M, often minute 9 



2. Spores subfusiform, 12 n or more in length 3 



2. Spores elliptical, oblong or oval 5 



3. Pileus 1.5-2.5 (3) cm. broad. 4 



3. Pileus 6-12 mm. broad, with minute, whitish or cinereous, granular 



scales, substriate; gills broad, distant; stem 1.5-2.5 cm. long, 

 slender, glabrous, whitish; spores 12-15 x 5-6 fx L. arenicola Pk. 



4, Gills white, becoming fumose on drying, broad; pileus 2-3 cm., 



with isabelUne, powdery scales; stem 5-6 cm. x 4-6 mm., furfura- 

 ceous, pale drab below; spores 12 x 7 m L. fumosifolia Murrill 



4. Gills white with gilvous tint; pileus 1.5-2.5 cm., gilvous or ful- 



vous-ochraceous on disk, margin pale; stem about 3 cm. x 3 mm., 

 with floccose scales; spores 11.5-13.5 x 4.5 fJ. {L. gracilis Quel, 

 var. laevigata Lange) L. laevigata Lange, comb. nov. 



5. Pileus not over 3.5 cm. broad 6 



5. Pileus rather large, 4-8(10) cm., striate-plicate on margin, densely 



flocculose-scaly, yellowish-brown, brown on disk; stem subven- 

 tricose or tapering upward, 4-12 (15) cm. x 4-6 mm. at apex, up 

 to 15 mm. at thickest part, subglabrous; annulus subpersistent; 

 spores 9-10 x 5-7 m, oval-elliptical L. cepaestipes Fr. 



6. Pileus with lilac or purple color present 7 



6. Pileus white, disk changing to brown on drying, 2-3.5 cm., disk 



subscabrous; stem 2-3 cm. x 2-4 mm.; spores 8-10x5-6 fx 



L. mutata Pk. 



7. Pileus or flocculose scales lavender or lilac-tinged 8 



7. Pileus and stem covered with a heliotrope-purple pulverulence, 1-2 



cm.; flesh white tinged-yellow; gills broad, rather distant; spores 

 8-10 X 3-4 M L. purpureoconia Atk. 



8. Odor fetid; gills rather narrow; pileus 1-2 cm. minutely scaly; stem 



toughish, dark brown to blackish below, 4-5 cm. x 2-2.5 mm.; 

 spores 9-1 1 x 2-2.5 ^t L. ecitidora Atk. 



