322 C. H. Kauffman 



22. Spores 8-9 x 3.5 /i, oblong-ellipsoid; pileus umbonate, umbo red- 

 dish-tan, with few delicate floccose scales, 2.5-3.5 cm.; stem 

 equal, 7-9 cm. x 2-4 mm L. amplifolia Murrill 



22. Spores 6 x 3 /i, oblong (Kauff) ; pileus umbonate, vinaceous-buff, 



1.5-2.5 cm., umbo obtusely conic, densely flocculose; stem 2-5 

 (6) cm. X 1.5-3 mm. (Spores 3.5 x 2 ^t Murrill) . .L. petasiformis Murrill 



23. Gills crowded; stem clavate, 8 mm. thick below, fibrillose, up to 7 



cm. long; pileus 3 cm. broad, white with rosy tint, subumbonate; 

 spores 6-7 x 4 ju L. roseicinerea Murrill 



23. Gills not crowded; stem slender, 2-4 mm. thick, 5-9 cm. long; 



pileus 1.5-3 cm., umbonate, snow-white or rose-tinted; spores 

 7-8 X 3.5 fx L. subnivosa Murrill 



24. Stem 2-3 mm. thick; pileus yellow-tinged 25 



24. Stem very slender, scarcely 1 mm. thick, 2-4 cm. long, brownish 



below; pileus 1-2 cm., umbonate, minutely brownish-scaly, umbo 

 dark brown; spores 5-6 x 3-4 /j. L. nudipes Pk. 



25. Spores 6-8 x 4 /x 26 



25. Spores 4-5 X 3 /x, elliptical; pileus 1-2 cm., white, becoming yellow- 



ish when dry, pruinose; stem 1-2 cm. x 2-3 mm., equal, fibrillose 

 below the median annulus; on mosses and among grass in woods 



L. parvannidata Lasch-Rea 



26. Pileus pubescent-glabrescent, whitish or tinged yellowish-in- 



carnate, umbo deeper yellowish; 1.5-2.5 cm.; stem 5-7.5 cm. 



long; subequal; annulus superior L. mesomorpha Fr.-Rea 



26. Pileus at length with minute, pale yellow scales, not umbonate, 

 1.5-2.5 cm.; stem 3-5 cm. long, base slightly enlarged; annulus 

 median. (In drying the whole plant assumes a rich yellow hue.) 



L. alluviina Pk. 



IV. SUBCLYPEOLARIAE 



1 . Spores fusiform or subtruncate-cuneatc 2 



1. Spores oblong, elliptical or ovoid 5 • 



2. Taste slight or none 3 



2. Taste strong of radish; pileus 3-6 cm., disk pale-yellowish, margin 



whitish and lacerate-scaly; stem 4-8 cm. x 3-6 mm., bulb 

 thicker; annulus at length lacerate and fugacious; spores fusiform 

 15-19 X 5-6 n; among grass in fields L. erminea Fr.-Ricken 



3. Spores not up to 12 p long, subtruncate-cuneate 4 



3. Spores 12-15 x 5-6 p, subtruncate at one end; pileus small, 10-15 



mm. broad, scales chestnut-brown; stem 3-4 cm x 2-2.5 mm., 

 clothed with chestnut-brown scales up to the annulus; flesh turn- 

 ing to brown when bruised; in woods L. geniculospora Atk. 



4. Odor somewhat disagreeable; pileus 1-3 cm., scales reddish-brown; 



stem 4-5 cm. x 2-4 mm., cortex tinged pinkish; spores 6-8 x 

 3-4 p L. cristata Fr. 



4. Odor none; pileus 3-5 cm., scales dark tawny; gills becoming 



ochraceous at maturity; stem 3-6 cm. x 3-6 mm., equal, con- 

 color; spores 9-10 x 3.5-4 p L. fulvella Rea 



5. Flesh or surface of plant changing color when bruised or in age 6 



