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Page number:39 
Description type:Non-original description 
Description:Lentinus polychrous Lév. Figures 2, 10-13 Annls Sci. nat. Bot. ser. III, 2 (1844) 175; Pegler, Kavaka 3 (1975) 1120, with synonymy.
L. elmeri Bres., Hedwigia 51 (1912) 307.
L. praerigidus Berk., Hook. Lond. J. Bot. 6 (1854) 132.
Pileus 5-16 cm wide, excentric and slightly infundibuliform to lateral and flabelliform or semicircular, often imbricate, dark fuliginous then fuscous brown to pale yellowish bistre or pallid ochraceous, greyish brown round the margin, wholly finely squarrose with small, rather crowded, fibrilloso-fasciculate, more or less recurved, fuscous squamules, weathering almost smooth, fibrillose towards the strigosofimbriate or hispid margin at first incurved with pale brownish bistre hairs, then straight and finally lacerate. Stem 0.5-2.5 cm x 4-18 mm above, central, excentric, or lateral, tapered to the abrupt and often blackish base, short, obconic, firm, pale cream white to pallid bistre, wholly finely scurfy villous, fuliginous squamulose when young. Gills deeply and rather unequally decurrent, crowded, 15-98 primaries 24.5 mm wide, 5-7 ranks, often shortly forked 1-3 times near the stemapex, pale fuliginous yellowish bistre, darker fuliginous brownish towards the entire or minutely denticulate edge, finally brownish ochraceous, without hyphal pegs or finely papillate with minute pegs. Flesh 3-8 mm thick in the centre of the pileus, 0.5-2 mm thick halfway to the margin, tough, dry, pliant, white.
On stumps and fallen trunks in the forest and in the open. Tropical Asia, not infrequent.
Spores 6-9.5 x 3-3.7 µm white, smooth, subcylindric, inamyloid, aguttate. Basidia 15-35 x 5-6 µm sterigmata 4. Cystidia none, the gill-edge sterile and denticulate from fascicles of shortly excrescent hyphal tips. Hymenium and subhymenium up to 70 µm thick, not or slightly thickening.
Hyphae dimitic with skeleto-binding cells; generative hyphae clamped, 2-5 µm wide, thin-walled, easily breaking at the septa, often in knots, not conspicuously longitudinal except at the surface of pileus and stem; skeletal cell-body 150-600 µm long, or merely 30-150 µm elongate fusiform, 5-7 µm wide in the middle (-13 µm wide near the surface of pileus and stem), 3-5 µm wide at the junction with the generative hyphae, intercalary or terminal, becoming thick-walled with linear lumen; binding processes -300 µm long, tapered to filiform tips 1-2 µm wide, mostly simple but occasionally with a branch, one process subapical, one sub-basal, and 1-2 lateral; in the pith of the stem many skeletal cells with short bodies and short, variously lobed or branched, even coralloid, binding processes closely applied to other skeletal cell-bodies and appearing as separate binding hyphae.
Gill-trama with radiate construction, the tepered ends of many terminal skeletal cells projecting into the hymenium but not reaching the surface. Surface of the pileus with fasciculate fibrils -800 µm long, shortly and thinly villous round the base of the fibrils, the villous layer making the scales, the fibrils weathering off; fibrils composed of fascicles of longitudinal concrescent generative hyphae with firm, slightly thickened walls, clamped, and with many skeletal cells reduced to short, accumbent, unbranched cells -150 µm long with thick brown walls and subclavate to ventricose-fusiform ends 6-16 µm wide with wide lumen, rarely with a short process from the cylindrical body 5-8 µm wide; villous layer -150 µm thick, composed of loosely accrescent ends of both skeletal cells and generative hyphae, the processes of skeletals often short, thick, and stiff, the generative hyphae with firm walls and rather distant clamps, some of the skeletal cell-bodies with dilated, subventricose, or fusiform, even subglobose ends -16 µm wide but more or less decumbent; no crust. Surface of the stem with the villous layer as on the pileus but often with thick-walled hyphae or the hyphal ends reduced to caulocystidia 25-80 x 3-10 µm.
This species has one of the most complicated hyphal constructions among fungi and is almost trimitic. It seems to lack the veil of L. badius, under which the species are compared. Some collections of L. polychrous seem to lack entirely the fasciculate fibrils on the pileus.
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