Part 1, 19141 AGARICACBAE 39 



forming an inferior, double, persistent annulus, which is whitish on its inner surface and fulvous 

 without. 



Type locality: Sweden. 



Habitat: Dry soil under conifers. 



Distribution: Eastern Canada and northern New England; also in Europe. 



Illustrations: Fries, Ic. Hymen, pi. 17; Barla, Champ. Alpes Marit. pi. 20, f. 1-3; Gill. 

 Champ. Fr. pi. 55 (35). 



12. 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 mucilagi- 

 nous 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. 



13. Armillaria umbilicata Pat. Bull. Soc. Myc. Fr. IS: 191. 1899. 



Pileus fleshy, soft, convex to plane and depressed, more or less umbilicate, gregarious, 

 1-5 cm. broad; surface moist, smooth, viscid, deep-red or chocolate-colored, paler with age, 

 becoming rusty or whitish, margin not striate; lamellae adnate-decurrent, straight, thin, 

 serrate, whitish, then rusty or brownish; spores ovoid, smooth, colorless, 6-7X3 m; stipe 

 central, coriaceous, becoming hard and woody, cylindric, equal, fibrillose throughout, pale- 

 rusty, 5-6 cm. long, 3-5 mm. thick; annulus apical, fugacious, fibrillose-membranous. 



Type locality: Guadeloupe. 



Habitat: On rotten trunks of Sloanea Massoni.^ 



Distribution : Known only from the type locality. 



14. Armillaria putrida (Scop.) Murrill. 



Agaricus putridus Scop. Fl. Cam. ed. 2. 2: 420. 1772. 



Agaricus melleus Vahl, Fl. Dan. 9. 1792. Not A. melleus Schaeff. 1774. 



Agaricus polymyces Pers. Syn. Fung. 269. 1801. 



Agaricus {Armillaria) melleorubens Berk. & Curt. Jour. Linn. Soc. 10: 283. 1868. 



Armillaria mellea Quel. Champ. Jura Vosg. 38. 1872. 



Armillaria solidipes Peck, Bull. Torrey Club 27: 611. 1900. 



Pileus convex to expanded, cespitose, 4- 1 2 cm. broad, very variable ; surface usually dry, 

 smooth or becoming striate toward the margin, pale-honey-yellow to dark-reddish-brown, 

 usually adorned with minute tufts of brown or blackish hairs, which are more abundant on 

 the disk ; context white or whitish, somewhat acrid and unpleasant to the taste ; lamellae adnate 

 or decurrent, white or whitish, becoming discolored or spotted with age, rarely yellow; spores 

 ellipsoid, smooth, hyaline, 7-10X4-6.5 p; stipe melleous, reddish-brown or dirty-brown below, 

 paler above, nearly equal, firm, fibrous, spongy within, usually floccose-scaly below the annulus, 

 4- 1 2 cm. long, 5- 1 5 mm. thick ; annulus white, cottony, with dark specks, or thin, arachnoid, 



and evanescent. 



Type locality: Carniola. 



Habitat: On stumps and buried roots of both deciduous and evergreen trees. 



Distribution: Cosmopolitan. 



