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

Smith ~ Hesler

323

incrustations; hypodermial region of rusty fulv ous floccose encrusted
hyphae 5-15 yp diam. Context hyphae interwoven, cells inflated, walls
thin smooth and yellowish to hyaline. Clamp connections present. All
hyphae inamyloid.
HABIT, HABITAT, AND DISTRIBUTION: On wood, Oregon, November.
Type studied.
OBSERVATIONS: We recognize this species with great reluctance, but
if cautlocystidia really are absent this would distinguish it from European
specinens of P. spu2nosa we have studied. Also, the utriform cheilocystidia mixed in witll the normal type for thle P. spurmosa group may be
an additional character. In fact tile presence of utriform cleilocystidia
indlicates a connection to P. gva'vcolcns but for P. vialis we have no data
on the odor. The lba) colored pileus disc would seem to exclude P.
spt1mmosa, but the dried basidiocarps are not too convincing. Tley resenmlle those of P. sputlmosa. P. plicci1ia differs in its clear bright yellow
p)ilelus as dried. No tlick-walled pleurocystidia were found.
175. Pholiota piceina (Minir.) comb. nov.
GyCn)177opii.s piceint7s Murrill, North Amer. Flora 10: 202. 1917.
Illustrations: Tlext figs. 387-389; pl. 79a.
Pileuls scattered or caespitose, 3-5 cm broad, convex to expanded.
obtuse, bright yellow, darker and reddish on the disc, very viscid, glabrotis, margin not striate. Context greenish yellow; taste mild.
Lamellae sinuate-decurrent, yellow to pale fuscous, subcrowded,
heterophyllus, rather broad, plane.
Stipe 3-5 cm long, 4-6 mm thick, concolorous but darker at tlle
l)ase, c!lindric, somewhat fibrillose, stuffed, becoming hollow.
Spores 7-9 x 4-5.i smooth, apical pore present but minute; slape
in face view oblong to elliptic or slightly ovate, in profile olscurely inequilateral; color in KOH tawny to ochraceous tawny, more ocllraceous
in IMelzer's reagent; wall about 0.25 pt thick.
Basidia 18-24 x 4-6 pt, 4-spored, obese, yellow in KOH and Melzer's
reagent. Pleurocystidia 38-66 x 9-12 /t, fulsoid-ventricose with obtuse
apex, smooth, thin-walled, content ochraceous to p)ale tawny, fading on
standling. Cleilocystidia 27-34 x 7-12,u fusoid ventricose, apex obtuse,
content mostly pale rusty brown to ochraceous; walls smooth or thinly
coated with ochraceous material. Caulocystidia at very apex of stipe,
similar to cheilocystidia.
Cill trama of a central area of floccose, parallel to interwoven llyplae
with elongate cells; walls tlin and pale ochraceous in KOH, smooth;
subhymnenium a thick layer of gelatinous narrow (1.5-3,u) interwoven
branched hyphae hyaline in KOH. Pileus cutis a gelatinous pellicle of
hyphae 2-3 pt, ochraceous in KOH and soon collapsing, smooth (as far
as observed); hypodermial region of floccose hyphae about like those of
context only slightly more ochraceous in KOH, smootl-walled as far as