North American Flora: Agaricales, Agaricaceae (Vol. 10 ... - MykoWeb

PART 1, 1914] AGARICACEAE 37
3. Armillaria magnivelaris (Peck) Murrill.
Agaricus (Armillaria) ponderosas Peck., Bull. Buffalo Soc. Nat. Set. 1: 42. 1873. Not A.
ponderosus Pers. 1801. '
Agaricus magnivelaris Peck, Ann. Rep. N. Y. State Mus. 29: 66. 1878.
Armillaria ponderosa Sacc. Syll. Fung. 5: 78. 1887.
Pileus thick, compact, convex or subcampanulate, 10-13 cm. broad; surface smooth, white
or yellowish, margin naked or clothed with the appendiculate veil, strongly involute; context
white; lamellae crowded, narrow, slightly emarginate, white inclining to cream-colored; spores
nearly globose, 4/¿; stipe stout, subequal, firm, solid, coated by the veil, concolorous, white
and furfuraceous above the annulus, 10-13 cm. long, 2.5 cm. thick; veil slightly viscid, long
persistent, at length lacerate, adhering in shreds to the margin and the stipe.
TYPE LOCALITY: Copake, New York.
HABITAT: On the ground in woods.
DISTRIBUTION: New York and New England.
4. Armillaria arenicola Murrill, Mycologia 4: 212. 1912.
Pileus firm, fleshy, convex to subplane or slightly depressed, gibbous, gregarious, 12-15
cm. broad; surface dry, smooth, glabrous, white or whitish, cremeous at the center; context
coarse, white, tasteless; lamellae adnate, becoming sinuate-adnexed or nearly free, ventricose,
plane, close, white, changing to rust-colored when bruised; spores globose, smooth, hyaline,
4-6 p; stipe equal or tapering downward, dry, smooth below, somewhat scaly above the annulus,
white tinged with cremeous, 12 cm. long, 3 cm. thick; annulus ample, persistent, membranous,
white, attached just above the middle of the stipe.
TYPE LOCALITY: Newport, Oregon.
HABITAT : In sand-hills among scrubby pines.
DISTRIBUTION: Known only from the type locality.
5. Armillaria macrospora Peck, Bull. Torrey Club 27: 610.
1900.
Pileus fleshy, fragile, convex, solitary or cespitóse, 5-20 cm. broad; surface glabrous,
viscid when moist, shining when dry, white, sometimes brown in the center; context white;
lamellae rather narrow, close, decurrent, white; spores oblong or subfusiform, 12-15X6-8/*;
stipe short, stout, subequal, white, 2.5-5 cm. long, 1.2-2 cm. thick; annulus thick, white.
TYPE LOCALITY: Colorado.
HABITAT: Dense spruce woods.
DISTRIBUTION : Known only from the type locality.
6. Armillaria ventricosa Peck, Bull. Torrey Club 34: 104.
1907.
Lentinus ventricosus Peck, Bull. Torrey Club 23: 414. 1896.
Pileus fleshy, convex or nearly plane above, 8-15 cm. broad; surface glabrous, shining,
white, margin thin, involute; context white or whitish; lamellae narrow, close, decurrent,
sometimes dentate or denticulate on the edges, whitish; spores 10-12X5-6 n; stipe short, thick,
ventricose, solid or sometimes hollow through erosion by insects, abruptly narrowed at the
base, annulate, white or whitish, 5-10 cm. long, 1.5-2.5 cm. thick.
TYPE LOCALITY: Tacoma Park, Washington, D. C.
HABITAT: On the ground in pine woods.
DISTRIBUTION : Alabama and District of Columbia.
7. Armillaria evanescens (Lovejoy) Murrill.
Catathelasma evanescens Lovejoy, Bot. Gaz. 50: 384. 1910.
Pileus broadly convex to nearly plane, solitary, 13 cm. broad; surface smooth, damp,
white, deep-cream in the center, becoming rich-ocher with a reddish tint when dried, margin
entire; context whitish, compact, thick at the center, thinner near the margin; lamellae very
decurrent, short ones intermixed with long ones, white, 2-3 cm. wide near the margin of the