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 Add this item to the list  Pleurotus subviolaceus Figure 35
Description type:Original description 
Description:Pleurotus subviolaceus Figure 35
Borneo, mont. Kinabalu. Typus, RSNB 1938 in Herb. Corner.
Pileus -3 cm wide (young), mesopodal to excentric, dry, opaque, minutely scurfy squamulose or finely appressedly fuliginous fibrillose in the centre, fuliginous to fuliginous violaceous, pater on expansion, smooth and pater to the pallid white incurved margin. Stem -20 x 57 mm, pruinose especially towards the apex, fibrous, solid, whitish above, pale fuliginous or violaceous fuliginous downwards. Gills deeply decurrent, rather crowded, 4-5 ranks, -2 mm wide (not fully grown), somewhat anastomosing at the stem-apex, thin, cream-white, edge entire. Flesh dry, firm, white. Smetl somewhat farinaceous or none.
On dead trunks in the forest, caespitose, 1700-1800 m alt. Bomeo, Kinabalu.
Spores 6-7.5 x 5-6.3 µm white, smooth, broadly ellipsoid to subglobose, 1-guttate, thin-walled, inamyloid. Basidia 35-50 x 9-11 µm, multiguttulate; sterigmata 4, 5-6 µm long. Cheilocystidia -55 x 713 µm, subclavate to subventricose, thin-walled, smooth, as a narrow sterile edge to the gill. Pleurocystidia as the cheilocystidia but mostly ventricose, at first very abundant as the first-formed sterile Basidia, but collapsing.
Hyphae monomitic, clamped, inflating, 3-16 µm wide, with the walls thickening -1.5 µm in the stem, longitudinal in the stem, more or less interwoven in the pileus and branching at a wide angle; oleiferous hyphae 3-S µm wide few.
Gill-trama with descending hyphae 3-8 µm wide. Surface of pileus with a compact layer of narrow radiating hyphae and scattered, more or less appressed, small clusters of hyphal ends 1-3 cells long with firm or slightly thickened brownish walls and subclavate end-cells -70 x 7-15 µm, these clavate hyphal ends forming a fairly compact palisade over the unexpanded pileus.
Unfortunately no fully grown specimens of this species were found. It may be another member of the `Lampteromyces group', but the spores and cystidia recall Pa. giganteus. Superficially it resembles small Pl. ostreatus, but with the violaceous tinge to stem and pileus.
Collections: - RSNB 1938, Mesilau, 1700 m alt., 22 Aug. 1961; RSNB 5568, 1800 m alt., Bembangan R., 1 March 1964.
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