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

Smith * Hesler

235

youth to age........................................ P. castanea
1. Lamellae olivaceous young; pileus yellowish tan to whitish................................... P. olivaceophylla
121. Pholiota castanea sp. nov.
Illustrations: Text figs. 262-265; pl. 59a.
Pilcl.s 3-5 cm latils, cornex.us, demlim late-convexus vel depressuls,
glaber, viscidlus, subcalstlanlcs. Coiltextsus albiduns. Lamnellae cemarginatae,
latac, con fertae, albidae det17m in teae. Stipes -1-6 cm longuls, -1-6 mm
crasslus, palliduis, fibrilloseus. Sporae 6-7.5(8) x 3.5-4 pt. Pleurocystidia
dimorpha: 1) 45-72 x 10-14 fu, filsoide-ventricosa. 2) 12-18 X 4-6 a,
vcntricosa, rostrata vel fusoide ventricosa vel elliptica. Specimen typicum
in Herb. Univ. Tenn. conservatlum est; legit prope Knoxville, Tenn.
Hesler 20269.
Pileus 3-5 cm broad, convex, finally expanded-convex, in age at
times depressed-concave, glabrous, viscid, "chestnut-brown" to "bister,"
paler when young (near "tawny"), margin even. Context thin, firm,
white; odor and taste mild.
Lamellae emarginate, white when young, finally "tawny-olive" or
slightly darker, close or crowded, rather broad, edges slightly eroded.
Stipe 4-6 cm long, 4-6 mm thick, tapering downward, pallid then
dingy, fibrillose, solid or somewhat stuffed. Veil webby, yellowish,
evanescent, leaving an evanescent ring.
Spores 6-7.5 (8) x 3.5-4 /j, oblong to elliptic in face view, oblong
to slightly bean-shaped in profile, smooth, dull cinnamon in KOH, paler
cinnamon in Melzer's sol., wall slightly thickened (~ 0.3 fu), apical pore
distinct but apex not truncate.
Basidia 18-24 (27) x 5-6 pL, 4-spored, ochraceous in KOH on sections of hymenium (in mass), in Melzer's reagent yellowish. Pleurocystidia: 1) 45-72 x 10-14 p., basically fusoid-ventricose but neck with
distinct constrictions and often thick-walled in the constriction, apex
obtuse to knobbed or with one or more bulgy proliferations, walls thin
(except as noted above), surface smooth, content homogeneous and in
KOH hyaline to ochraceous. 2) 12-18 x 4-6,u, ventricose-rostrate to
fusoid ventricose to elliptic and then about 18 x 8 pt, hyaline thin-walled,
smooth, content homogeneous, buried in hymenium. Cheilocystidia
26-38 x 6-9 pL (12) pt, subfusoid, to fusoid-ventricose, thin-walled,
yellow in KOH mostly, and content homogeneous. Caulocystidia in
agglutinated tufts, 18-35 x 4-9 pA, versiform, (basidium-like, contorted,
subfusoid, or filamentose), yellow in KOH, walls smooth.
Gill trama of filamentose subparallel to interwoven hyphae witl
elongate cells 8-20 p. broad, walls slightly thickened (middle-lamelli
evident), refractive, smooth and ochraceous in KOH; subhymeniuni
cellular; cells 3-6,p diam. and walls not gelatinous. Pileus cutis a thick
gelatinous layer of narrow (2-3 fp) ochraceous smooth hyphae easil\