Chamaemyces alphitophyllus (Berk. & M. A. Curtis) Earle 1909

Armillaria alphitophylla (Berk. & Curt.) Murrill
Agaricus {Mycena) alphttophyllus Berk. & Curt. Proc. Am. Acad. 4: 112. 1860. Agaricus (Mycena) leucoconis Berk. & Curt. Proc. Am. Acad. 4: 113. 1860. Agaricus {Amanita) cubensis Berk. & Curt. Jour. Linn. Soc. 10: 282. 1868. Agaricus (Armillaria) cheimonophyllus Berk. & Curt. Jour. Linn. Soc. 10: 284. 1868. Mucidula cheimonophylla Pat. Bull. Soc. Myc. 15: 192; 1899. Chamaemyces alphitophyllus Murrill, Mycologia 3: 91, 1911.
Pileus toughish, drying easily, convex to plane or depressed, very variable, solitary, 3-15 cm. broad; surface varying from subglabrous to fibrillose or squamose, and from white or whitish to avellaneous or rarely to isabelline, the disk dark-avellaneous, fuliginous, or at times rosy-isabelline; margin thin, entire, even, or at times striate or plicate; context thin, white; lamellae pure-white, ventricose, rounded-adnate with a decurrent tooth, somewhat mucilaginous and sticking together in a peculiar way when young; spores globose, smooth, hyaline, 16-20 n; cystidia abundant, protruding, ventricose, tapering at both ends, 100-200X25-40 y. stipe cylindric and equal above, somewhat enlarged below, white to pale-avellaneous, glabrous, furfuraceous, or somewhat roughened with erect scales, solid, fleshy with a tough rind, 4^6 cm. long, 4—8 mm. thick; veil small, soon appendiculate, not forming a distinct annulus.
Type locality: Bonin Islands.
Habitat: Exposed hardwood logs and decayed spots in standing trunks.
Distribution: Louisiana, Mexico, West Indies; also in the Bonin Islands and Tonkin.