The North American Species of Pholiota

188. Pholiota trullisata sp. nov.

Illustrations: Text figs. 517-519.

Pileus 4-10 cm latus, convexus, viscidus, aurantio-brunneus, virgatus. Lamellae albidae demum subolivaceo-griseae dein luteo-brunneae, confertae. Stipes 5-12 (14) cm longus, 8-18 mm crassus, radicatus, sursum albidus, deorsum luteus. Sporae 5.5-6.5 x 4-4.5 µ. Pleurocystidia 36-52 x 9-15 µ. Specimen typicum in Herb. Univ. Mich. conservatum est; legit prope Santa Maria, Calif. 9 Jan. 1954, John L. Moore.

Pileus 4-10 cm broad, broadly convex with an inrolled margin, becoming nearly plane, with a whitish band of fibrils along the margin from the veil, glabrous and slimy-viscid otherwise, virgate with dark brown streaks against an orange brown disc and a light tan margin; hygrophanous and fading on disc first to dingy yellowish tan. Context pallid and without a distinctive odor and taste.

Lamellae white when veil breaks, becoming olive-drab and finally dingy brown, close, adnexed, moderately broad, edges wavy.

Stipe 5-12 (14) cm long, single or compound, often sunken deeply in the sand and clavate to trowel-shaped over the underground portion (like Laccaria trullisata), 8-15 mm thick above ground line, with a superior veil-line and white fibrillose above it, bright yellow below it but this color soon fading, in addition with brown patches of fibrils (of outer veil material?) which soon disappear, darkening in base around worm holes, stuffed becoming hollow.

Spores rusty brown in deposit, 5.5-6.5 x 4-4.5 µ, smooth; apical pore extremely minute; shape in face view broadly ellipsoid, in profile merely ellipsoid, very slightly compressed; color in KOH dull cinnamon, about the same color in Melzer's reagent; wall about 0.3 µ thick.

Basidia 4-spored, 17-23 x 6-7 µ, hyaline in KOH. Pleurocystidia 36-52 x 9-15 µ, fusoid-ventricose, distinctly projecting, thin-walled, smooth, apex obtuse, content in KOH orange-ochraceous in neck and homogeneous. Cheilocystidia similar to pleurocystidia but smaller. Caulocystidia none or at very apex a few and these resembling cheilocystidia.

Gill trama a central area of parallel hyaline thin-walled hyphae with inflated cells in age (up to 15 µ), ochraceous contorted oleiferous hyphae also present (as seen in mounts revived in KOH); subhymenium of narrow (2-4 µ) hyaline hyphae in a gelatinous matrix. Pileus cutis a thick gelatinous pellicle of narrow (2-4 µ) hyaline to ochraceous hyphae (revived in KOH), the hyphal walls becoming transversely crinkled and collapsing; hypodermium of rusty brown compactly interwoven hyphae with smooth to incrusted walls, the hyphae not of greater diameter than those of the context. Context hyphae 5-10 µ diam., not much inflated, hyaline in KOH, yellowish in Melzer's reagent. Clamp connections present.

Habit, Habitat, and Distribution: Caespitose near a stump (pine?), Santa Maria, Calif. Jan. 9, 1954, Coll. John L. Moore, type.

Observations: This is a very odd Pholiota because of the long rooting base often giving rise to a number of secondary stipes (merismoid) and with adhering sand much as in Laccaria trullisata, the rather broadly ellipsoid spores, and the relatively short pleurocystidia for the group. It's relationships appear to be in the P. lubrica complex but the spores at once distinguish it from all of these.