North American species of Crepidotus, by L.R. Hesler and Alexander H. Smith.

134

North American Species of Crepidotus

crenulatae. Sporae 7.5-10 X 4.5-5.5,, ovoideae vel ellipsoideae, punctatae. Basidia
22-27 X 5-6 A, tetraspora. Pleurocystidia desunt; cheilocystidia 31-63 X 4-9 [l.
Cuticula ex hyphis repentibus composita, hyphas erectas, sinuosas et in spiram volutas,
sine colore gerens. Fibulatae adsunt. Specimen typicum in Herb. Univ. Mich.; lectum in
Cheboygan County, Mich., Aug. 7, 1946, A. H. Smith 22054.
Pileus 3-7 mm broad, convex, becoming flabelliform, or, when on the
lower side of the substratum, reniform, fibrillose, yellowish, drying dull
pinkish buff.
Lamellae radiating, broad, close to subdistant, cinnamon buff when
dried, edges crenulate.
Stipe none, or present as a pseudostipe.
Spores 7.5-10 X 4.5-5.5 /A, ovoid to ellipsoid, inequilateral in profile,
punctate, near cinnamon buff in 2% KOH. Basidia 22-27 X 5-6 /A, 4 -spored. Pleurocystidia none; cheilocystidia 31-63 X 4-9 /A, cylindric, ventricose, at times clavate, with or without a neck. Gill trama subparallel, hyphae
4-6 / broad. Pileus trama interwoven. Cuticle of repent hyphae, bearing a
turf of colorless hyphae, the apical portion more or less crooked and coiled.
Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION: On hardwood sticks, Michigan,
August.
MATERIAL STUDIED: MICHIGAN: Smith 22054, type, from Wolf's
Bog, Cheboygan County, Aug. 7, 1946.
OBSERVATIONS: This species is related to C. circinatus, but is distinguished
by its larger spores.
119. Crepidotus milleri sp. nov.
Illustration: Fig. 195.
Pileus 10-22 mm latus, sessilis, colore cremeus, villosus, fiabelliformis, margine
incurvatus. Lamellae confertae, medio-latae, albae deinde obscurae. Sporae 7-9(10)
X 4-5(5.5) Iu, ellipsoideae demum ovoideae, punctatae. Basidia 23-27 X 5-6!i,
tetraspora. Pleurocystidia desunt; cheilocystidia 26-58 X 4-13 tI. Cuticula sine magno
discrimine, superficies hyphas erectas sine colore gerens, 3-5 I latas. Fibulatae adsunt.
Specimen typicum in Herb. Univ. Mich.; lectum prope Fox Forest, New Hampshire,
0. K. Miller 546.
Pileus 10-22 mm broad, sessile, cream color, villose, hirsute behind,
flabelliform, margin incurved.
Lamellae close, medium broad, white then tawny, edges more or less
fimbriate.
Spores 7-9(10) X 4-5(5.5) /, ellipsoid to ovoid, inequilateral in profile, punctate, walls at times collapsed or ruptured in 2% KOH. Basidia
23-27 X 5-6 /i, 4-spored. Pleurocystidia none; cheilocystidia 26-58 X 4-13
/A, cylindric, clavate, ventricose, apices rounded, at times capitate, more
rarely forked. Gill trama tortuous-subparallel to interwoven, hyphae 4-9 /
broad. Pileus trama loosely interwoven. Cuticle not sharply differentiated,
the surface bearing more or less of a turf, the hyphae colorless, 3-5 /t broad.
Clamp connections present.