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 Add this item to the list   P. squamosus Fr. Figures 1-3
   
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Page number:1-222 
Description type:Non-original description 
Description:P. squamosus Fr. Figures 1-3
For convenience I have summarised the microscopic details given in my early account (Corner 1953). The many macroscopic variations are given by Bondartsev (1953, 1971).
Fruit-bodies at first monomitic, becoming dimitic on the pileus reaching 9-12 cm in radius (12-20 cm wide).
Basidia 38-60 x 8.5-9.5 µm (with spores 11.5-15 x 4.5-5.5 µm), finely granular guttulate; sterigmata 4, 6-7 µm long. Cystidia none. Subhymenium 10-14 µm thick.
Hyphae not dextrinoid, not encrusted. Generative hyphae 3-5.5(-8) µm wide at the margin of the pileus, with penultimate cells 30-125 µm long, inflating -18 µm wide, clamped. Skeletal cells 100-600 x 518 µm, walls -1.5 µm thick, intercalary, often consecutive; binding processes 1 subapical, 1 sub-basal, 1-2(-3) lateral, with stalks 200-600 x 5-10 µm, bifurcate into tapering filiform ends 100-600 x 1.52.5 µm (0.7-1 µm at the tip), the sub-basal process usually unbranched, the subapical once furcate, the lateral 1-2 times furcate. Dissepiments dimitic as the flesh but the generative hyphae with subgelatinous walls, not inflating; skeletal cells 2.5-4.5 µm wide, shorter than in the flesh, with binding processes -350 µm long overall, 1-4 lateral and 2-3 times furcate.
Surface of pileus at first with a subgelatinous watery pellicle 100-180 µm thick, extending from the margin, composed of more or less contiguous, appressedly radiating and interwoven, hyphae 3-6 µm wide; the pellicle thickening on its inner side with the addition of generative hyphae and binding processes, the outer part drying up and splitting into the innate brown scales; hyphal ends excrescent between the scales -60 x 3-7 µm, 0-2 septate with clamps; no palisade.
Surface of stem as that of the pileus but with copious excrescent hyphae forming a pile and becoming more or less agglutinated with dark brown walls, these hyphae at first amyloid (Pouzar), not brown scaly.
Colour of the brown scales on the pileus in the walls of the effete hyphae, less in the cell-sap or as a granular excretion.P. coronatus Rostk. is distinguished by Maas Geesteranus (Fungus 25, 1955, 50) by its smaller mesopodal pileus and non-parasitic habit; to these points Pouzar (1972) adds that the hyphae on the darkening pile on the stem of P. coronatus are not amyloid. Ryvarden (1978) gives P. coronatus as a synonym of P. lentus Berk. I have never seen P. squamosus in the tropics.
 
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