30 NORTH AMERICAN FLORA [Volumb 10 



margin paler, somewhat lobed or irregular; context white, with farinaceous taste and odor; 

 lamellae deeply ,sinuate to adnexed, close, narrow, plane, white, scarcely changing on drying ; 

 spores globose, smooth, hyaline, 5-8 ju; stipe cylindric or slightly flattened, scarcely enlarged 

 below, glabrous, nearly smooth, whitish or brownish, solid, 6-8 cm. long, 1-3 cm. thick. 



Type locality: Stanford University, California. 



Habitat: In soil under live oaks. 



Distribution : Known only from the type locality. 



111. Melanoleuca arenicola Murrill, Mycologia 5: 214. 1913. 



Tricholoma arenicola Murrill, Mycologia 5: 223. 1913. 



Pileus convex to subexpanded, umbonate, terraced, reaching 10-12 cm. broad; surface 

 smooth, glabrous, ferruginous, apparently viscid when fresh, bringing up adhering particles 

 of sand; context mild to the taste, but with a strong, unpleasant odor; lamellae sinuate, ven- 

 tricose, crowded, pallid, becoming discolored with subferruginous blotches; spores ellipsoid, 

 smooth, hyaline, abundant, about 5-6X3-4 m," stipe long, slightly attenuate downward, fleshy, 

 white, glabrous, except for a few fibrils where the margin of the pileus rested against it, 

 reaching 10 cm. long and 2 cm. thick. 



Type locality: Newport, Oregon. 

 Habitat: In deep, pure sand in pine barrens. 

 Distribution: Known only from the type locality. 



112. Melanoleuca subannulata (Peck) Murrill. 



Armillaria subannulata Peck, Bull. Torrey Club 36: 330. 1909. 

 Melanoleuca califomica Murrill, Mycologia 5: 216. 1913. 

 Tricholoma californicum Murrill, Mycologia 5: 223. 1913. 



Pileus convex to subplane, rather thick at the center, gregarious, reaching 15 cm. broad; 

 surface smooth, glabrous, evidently viscid when fresh, bringing up adhering particles of soil, 

 reddish-brown at the center, much paler at the margin, which isj thin, entire and inflexed 

 on drying; context white, rather thick at the center, thinning out toward the margin, 

 slightly bitter to the taste, odor musty; lamellae quite narrow, less than the thickness of the 

 context, sinuate to adnexed, plane, crowded, white, scarcely changing color on drying; spores 

 broadly ellipsoid, smooth, hyaline, 5-7X4-5 /x; stipe very long, subequal, smooth, glabrous, 

 white, solid, 10-15 cm. long, reaching 3 cm. thick. 



Type locality: Claremont, California. 

 Habitat: Under oaks or in cultivated fields. 

 Distribution: California and Nevada. 



113. Melanoleuca subpessundata Murrill, Mycologia 5: 222. 1913. 



Tricholoma subpessundatum Murrill, Mycologia 5: 223. 1913. 



Pileus becoming plane or slightly depressed, usually with a conic or rounded umbo, gre- 

 garious, reaching 6.5 cm. broad; surface dry or slightly viscid, subglabrous, latericious, bay on 

 the umbo, usually smooth, varying at times to radiate-rimose and imbricate-squamulose except 

 on the umbo ; context with a farinaceous odor and taste ; lamellae sinuate, usually with a 

 decurrent tooth, ventricose, broad, not crowded, pale-rosy-isabelline, the edges often notched ; 

 spores globose to subglobdse, smooth, hyaline, uninucleate, 6-7 /x; stipe slender, equal or enlarged 

 below, smooth, pale-rosy-isabelline, glabrous above, decorated below with scattered, latericious 

 fibrils, fleshy, solid or hollow, 7-9 cm. long, 7-10 mm. thick. 



Type locality: Glen Brook, Oregon. 

 Habitat: In soil in woods. 

 Distribution: Oregon and California. 



114. Melanoleuca avellaneifolia Murrill, Mycologia 5 : 215. 1913. 



Tricholoma avellaneifolium Murrill, Mycologia 5: 223. 1913. 



Pileus fleshy, rather thick, convex to expanded, gibbous, subcespitose, reaching 9 cm. broad; 

 surface polished, smooth, somewhat viscid, dull-blackish-fuliginous, margin entire, concolorous, 

 inflexed on drying; lamellae sinuate, ventricose, several times inserted, not crowded, pale- 



