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Literature:
 
Page number:1-222 
Description type:Non-original description 
Description:Laetiporus sulphureus (Fr.) Murrill Figures 13-15 Mycologia 12 (1920) 11; Corner, Phytomorphology 3 (1953) 157; Ryvarden and Johansen, Prel. Polyp. Fl. E. Africa (1980) 393.
I give the following facts for convenience.
Spores 5-7 x 3.5-5 µm, 6.7-7.8 x 5-5.7 µm (Bakshi), white, smooth, broadly ellipsoid, thin-walled, with opalescent contents (not guttate).
Basidia 17-25 x 7.5-10 µm, without clamps; sterigmata 4, 4-5 µm long.
Generative hyphae inflating with cells 50-350 x 7-20 µm, the growing tips at the margin of the pileus 3.5-6 µm wide with penultimate cells 25-70 µm long. Skeletal cells as the generative cells but with thick walls, intercalary, solitary or consecutive, easily separating at the septa. Binding processes -500 µm long, inflating 5-12 µm wide in the proximal part, becoming many times furcate with obtuse or filiform tips 1-3 µm wide, thick-walled, many arising from a skeletal cell without special order. Oleiferous hyphae -12 µm wide, thin-walled, unbranched, scattered. Dissepiments monomitic with uninflated submucilaginous hyphae 3-6 µm wide, strictly longitudinal, many with somewhat thickened walls (as if uninflated skeletal cells, some with slight lateral protuberances as if incipient binding processes).
Surface of pileus at first with a compact pile of generative hyphal ends, then infiltrated with interweaving. laterals of generative hyphae and the thin-walled ends of the binding processes; not agglutinated, no crust.
Yellow colour of the margin of the pileus and of the tubes in the cytoplasm of the hyphae, even in the basidia, to a slight extent in the hyphal walls. Pink colour of the surface of the pileus and upper part of the flesh in the hyphal walls.
f. albolabyrinthiformis Rea: pores white and entirely, if minutely, labyrinthiform.
 
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