The North American Species of Pholiota

91a. Pholiota malicola var. macropoda var. nov.

Illustrations: Pls. 38, 39.

Pileus (3) 4-12 (15) cm latus, late convexus, viscidus vel subviscidus, glaber, luteus, olidus. Lamellae sublatae, confertae, adnatae, pallidae demum luteae. Stipes 6-10 (18) cm longus, 4-10 (25) mm crassus, sparse fibrillosus, sursum pallidus vel luteus, deorsum demum fulvus. Sporae 7.5-11 x 4.5-5.5 µ. Pleurocystidia nulla. Specimen typicum in Herb. Univ. Mich. conservatum est; legit prope Pen Basin, Landmark, Idaho, 5 Aug. 1958 Smith 59660.

Pileus (3) 4-12 (15) cm broad, convex, expanding to broadly convex or nearly plane, margin often wavy to lobed, viscid, glabrous except for faint veil remnants along the margin, disc orange-buff, pale yellow to watery dingy ochraceous-tawny, near "warm-buff" or brighter where faded, often with a watery zone along the incurved margin. Context rather thick and firm, yellowish; odor faintly fragrant, often suggestive of green corn; taste mild; with FeSO4 bright green.

Lamellae close, adnate to adnexed, yellowish when young, pale rusty-brown in age, narrow to moderately broad, thin, edges even, color change when bruised none or at times slowly orange.

Stipe (4) 6-10 (18) cm long, 4-10 (25) mm thick, equal or narrowed below, solid, surface pallid to yellowish and silky above, with a faint evanescent zone of fibrils from the thin veil, lower part fibrillose-striate, becoming dark rusty brown from base upward, veil pallid to buff.

Spores 7.5-11 x 4.5-5.5 µ, smooth, apical pore distinct but apex not truncate; in shape narrowly ovate to nearly elliptic, in profile somewhat inequilateral to narrowly oval; in KOH dingy pale tawny becoming more ochraceous on standing, in Melzer's reagent moderately dextrinoid (tawny-red) wall about 0.3 µ thick.

Basidia 20-25 (30) x 5-6 µ, 4-spored, clavate, yellow in KOH and also in Melzer's reagent. Pleurocystidia none. Cheilocystidia (20) 30-41 x 6-9 µ, clavate to somewhat fusoid-ventricose but mostly irregular in outline, smooth, thin-walled, content homogeneous. Caulocystidia versiform, 25 x 10 µ, or 28-47 x 4-9 µ, some occasionally more elongate-subclavate, hyaline to yellowish in KOH, walls thin and smooth, content homogeneous.

Gill trama a central area of floccose subparallel hyphae with short cells becoming inflated in age or cells more elongate toward gill edge, walls thin, smooth and pale yellow in KOH; subhymenium cellular, 2-5 cells, deep, not gelatinous. Pileus cutis a gelatinous layer of yellowish hyphae 3-5 µ diam. and having incrustations of pigments over them, grading evenly into a zone of wider (5-10 µ) hyphae with smooth to heavily incrusted walls tawny in KOH and orange to red in Melzer's sol. Context hyphae of inflated cells with thin smooth pale yellowish walls in KOH. Clamp connections present. All hyphae inamyloid.

Habit, Habitat, and Distribution: Caespitose on conifer and hardwood trees, at the base of stumps or attached to buried wood, Michigan, Idaho, the Pacific Northwest and Northern California, August-November.

Observations: This resembles the type variety, but differs in its fragrant odor, its more yellowish flesh, and more poorly developed veil. The stipe tends to become greatly enlarged in age.

Material Examined: CALIFORNIA: White 551. IDAHO: Smith 59660 (type), 60741, 60742, 65989, 70146, 70887. OREGON: Smith 19458, 55877. WASHINGTON: Smith 3362.