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

Hesler * Smith

125

FIG. 27. C. submollis

OBSERVATIONS: The moderately large, obscurely punctate spores, the
crooked or contorted cheilocystidia, and straight hyphae on the pileus are
characteristic of C. submollis. The pileus margin apparently is not always
sulcate-plicate.
110. Crepidotus cesatii (Rab.) Sacc. Michelia 1: 2. 1877.
Agaricus cesatii Rab., Fl. Ratish., p. 564. 1851.
Illustration: Fig. 184.
Pileus 5-20 mm broad, pure white, sessile or nearly so, cupulate, then
conchoid and reflexed, base often bilobed, villose, fibrillose behind, margin
involute, villose. Context thin at the margin, thicker at the center, soft,
white; odor and taste mild or none.
Lamellae radiating from a lateral or eccentric point, white, then pale
flesh-color, finally rusty-flesh color to rusty, with numerous lamellulae,
medium broad, moderately close.
Spores (6.5)7-9(10) X 5.5-7(7.5) /A, broadly ellipsoid, punctateechinulate, pale yellowish-brown in 2% KOH. Basidia (18)25-32 X 6-8
/p, 4-spored. Pleurocystidia none; cheilocystidia 28-50 X 6-7(10) /, contorted, forked, knobbed, subcylindric, ventricose. Gill trama subparallel,
hyphae 6-12 /t broad. Pileus trama interwoven. Cuticle of repent hyphae,
or at times not sharply differentiated, the surface bearing a turf of colorless
hyphae, 3-4.5(6) / broad. Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION: On hardwood and conifer wood,
Europe, summer and autumn.