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 Add this item to the list  Lentinus squarrosulus Mont.
Page number:46 
Description type:Non-original description 
Description:Lentinus squarrosulus Mont.
Annls Sci. nat. Bot. ser. 2, 18 (1842) 21; Pegler, Fl. Ill. Champ. Afr. Centr. fasc. 1 (1972) 13, pl. III, IV, with synonymy; Pegler, Kavaka 3 (1975) 11-20.
L. subnudus Berk., Hooker Lond. J. Bot. 6 (1847) 492.
? L. cladopus Lév., Annls Sci. nat. Bot. ser. 3, 2 (1844) 174; Pegler, id. (1972) 18, (1975) 11-20.
Entirely white, becoming pale straw-colour to pale ochraceous, the
scales on the pileus varying pale brownish or pale fuscous in some collections; gills cream-color.
Pileus 1-12 cm wide, convex then plane and umbilicate to infundibuliform, dry, opaque, more or less furfuraceous-squamulose with small and often subrevolute scales, varying appressedly subsquamulose; margin often becoming lacerate. Stem 1-6 cm x 2.5-7 mm, more or less excentric, rarely lateral, subcylindric, fibrous, scurfy-squamulose downwards to the abrupt and often blackish base, in some cases with a slight floccose zone or short collar at the stem-apex. Gills deeply decurrent, crowded, thin, 38-60 primaries 1.5-9 mm wide, 4-6 ranks but in some cases also dichotomous especially near the stemapex, occasionally slightly reticulate at the base, edge entire; hyphal pegs abundant. Flesh 1-2.5 mm thick in the centre of the pileus, dry, tough, flaccid.
On dead wood in the forest and in the open, often more or less caespitose. Tropics of the Old World, common.
Spores 5.5-9 x 1.8-2.7 µm white, smooth, subcylindric, inamyloid, aguttate. Basidia small, with 4 sterigmata. Hymenium not thickening. Cheilocystidia as sterile basidia along the sterile gill-edge. Pleurocystidia none. Hyphal pegs -60 (-120) x 15-25 (-38) µm abundant on the edges and sides of the gills, often with incipient sterile basidia.
Hyphae dimitic with skeleto-binding cells; generative hyphae 2-8 µm wide, clamped, thin-walled; skeletal cell-bodies 70-800 x 4-8 µm walls 1-2 µm thick, mostly intercalary, some terminal, often becoming more or less solid in the stem; binding processes -750 µm long, 2.5-4.5 µm wide on origin, tapering to filiform tips, becoming very thickwalled, generally one distal and one proximal, sometimes also 1-2 lateral, simple or 1-2 times furcate; oleiferous hyphae in the stem and pileus, as scattered intercalary generative cells -300 x 3-5 µm.
Gill-trama with radiate construction or somewhat obliquely descending. Surface of stem with scattered sterile basidia, soon collapsing. Surface of pileus with a layer of appressed generative hyphae splitting into squamules or in places excrescent into squamules, without skeletal cells, the end-cells often slightly swollen.
This is a common fungus of rapid growth and short life, readily putrescent, quickly fly-blown, and easily shredded by rain. It has generally been called L. subnudus. Young fruit-bodies in the monomitic stage, when they are readily mistaken for Pleurotus, are edible; the older are too tough; yet, the barok-monkeys that I kept refused to eat young or old. The species is very variable. In exposed places, lack of rain after the first early downpour may produce small fruit-bodies in contrast with the larger, developed in continuous humidity; in the first case the gills are commonly 1.5-3 mm wide, while in the second they grown to 9 mm. Heavy rain flattens the scales on the pileus and causes their appressed appearance in many collections. In some cases these scales are brownish or pale fuscous through the browning of the hyphal walls, similar to the blackening which may occur at the base of the stem. A few collections which I made in the Solomon Islands had rather frequent dichotomous gills (RSS 806, and Corner s.n. 1 June 1964). The primordia of RSS 806 and those of a Bornean collection (Corner s.n., Jesselton, May 1964) had a small ring at the stem-apex, surrounding the margin of the pileus, just as in L. sajor-caju.
Though this species has not been recorded from Tropical America, yet the American L. hirtus (Fr.) Murr., L. striatulus (p. 32), and L. concavus (p. 30) are closely related and may, even, be considered as varieties.
Concerning L. cladopus, of which only the type from Singapore seems to be known, though it is recorded from Africa with spores 3.74.7 µm wide (Pegler 1972), I cannot see in it any more than L. squarrosulus flattened by rain.
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