38 NORTH AMERICAN FLORA [Volume 10 



pileus, becoming narrow near and on the stipe, subdistant, edges acute; spores ellipsoid to 

 fusiform, smooth, hyaline, 14-17.5X3-5 p. ; stipe very short, thick, fleshy, hollow, smooth, 

 white, becoming rich-ocher tinged with reddish when dried, 4 cm. thick; veil large, white, 

 smooth, opening around the top leaving a thick, even, white margin, persistent and closely 

 embracing the base of the stipe. 



Type locality: Brooklyn Lake, Snowy Range, Wyoming, 3500 m. elevation. 

 Habitat: Open balsam and spruce woods, occurring singly in sod on thick humus. 

 Distribution: Known only from the type locality. 



8. Armillaria nardosmia (Ellis) Sacc. Syll. Fung. 5: 86. 1887. 



Agaricus nardosmius Ellis, Bull. Torrey Club 6: 75. 1876. 



Pileus fleshy, firm, solitary, 6-9 cm. broad; surface fibrillose, whitish to lilac-avellaneous , 

 variegated with brown spots, especially near the center; cuticle thick, tough, separable; 

 context white, thick and compact on the disk, thin toward the margin, odor aromatic; lamellae 

 crowded, subventricose, slightly emarginate, whitish; spores subglobose, 7 mJ stipe solid, 

 fibrous, not bulbous, sheathed below by the brown, velvety veil, 7 cm. long, 1-3 cm. thick; 

 annulus narrow, spreading, uneven on the edge. 



Type locality: New Jersey. 



Habitat : Ground in oak or mixed woods. 



Distribution: Eastern United States, New York to Virginia. 



Illustration: Hard, Mushrooms/. 42. 



Exsiccati: Ellis & Ev. Fungi Columb. 1401. 



9. Armillaria albolanatipes Atk. Ann. Myc. 6: 54. 1908. 



Pileus convex to expanded, umbonate, solitary or rarely gregarious, 5-6 cm. broad; 

 surface viscid, yellowish to yellowish-brown, darker in the center, margin thin, slightly repand, 

 smooth; context very fragile when dry; lamellae thin, sinuate-adnexed, white to pale-yellowish, 

 subdistant ; spores subellipsoid, smooth, hyaline, 6-9 X 4—5 /z ; stipe straight, even, solid, white, 

 coarsely floccose, woolly up to the veil, smooth above, 6-8 cm. long, 8-10 mm. thick; veil 

 present when young, persisting as a not very prominent annulus. 



Type locality: Corvallis, Oregon. 

 Habitat: Among leaves in mixed woods. 

 Distribution: Oregon, California. 



10. Armillaria umbonata (Sumstine) Murrill. 



Vaginata umbonata Sumstine, Mycologia 6: 35. 1914. 



Pileus thin, convex or expanded, distinctly conically umbonate, 3.5-5 cm. broad; surface 

 smooth, tan-colored, covered with darker, triangular scales arranged in somewhat concentric 

 zones; lamellae 3-5 mm. broad, ventricose, sinuate, adnexed; spores ovoid to ellipsoid, 5-7 /z; 

 stipe solid, equal, concolorous, with along bulbous root, 9-12 cm. long; veil at length fimbriate, 

 adhering closely to the stipe below, suggesting a volva. 



Typb locality: Ohiopyle, Pennsylvania. 

 Habitat: In sandy soil. 

 Distribution : Pennsylvania. 



11. Armillaria nobilis Murrill. 



Agaricus imperialis Fries; Lund, Consp. Hymen. Holm. 5. 1845. Not A . imperialis Batsch, 1783. 

 Armillaria imperialis Quel. Champ. Jura. Vosg. 37. 1772. 

 Mastoleucomyces imperialis O. Kuntze, Rev. Gen. 2: 861. 1891. 



Pileus compact, convex to expanded, obtuse, at times slightly depressed, large and striking 

 in appearance, solitary, 11-16 cm. broad and 6-8 cm. thick; surface fuscous-brown, variegated 

 with ap pressed, obscure scales, especially toward the center, margin glabrous, somewhat 

 striate, subentir e, thick, concolorous ; context very thick, white ; lamellae narrow, white, long- 

 decurrent, several times inserted, subcrowded; spores smooth, hyaline, s'ubfusiform, 12-14 X 

 5-6 fi; stipe subequal, solid, whitish to subconcolorous, subsquamose below the annulus, 11-14 

 cm. long, about 4 cm. thick; veil ample, membranous, sheathing the base of the stipe and 



