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Page number:25 
Description type:Culture description 
Description:Sporotrichum versisporum (Lloyd) Stalpers - Figs 10-11.
Teleomorph: Laetiporus sulphureus (Bull. : Fr.) Bond. & Sing.
Growth on ChA 35-60 mm radius in 14 days; on MEA 0-20 mm radius in 14 days. Cardinal temperatures: minimum 9°C, optimum 28-30°C, maximum 34-35°C. Advancing zone appressed to raised, even, hyphae distant. Colony generally appressed at the margin, tufts of aerial mycelium present in the central parts; colony later becoming floccose to thin cottony, agar remaining visible between the hyphae. After 3-4 weeks becoming farinaceous or plumose-farinaceous. Colony at first cream-coloured, becoming Pale Ochraceous Buff (5A2) to Warm Buff (4A4), or Pale Orange Yellow (5A4), Pale Ochraceous Salmon (5A3) or Ochraceous Buff (5A5, 5134). No reaction with KOH. Reverse unchanged. Reaction with a-naphthol and p-cresol negative. Odour insignificant.
Marginal hyphae hyaline, thin-walled, 2.5-8(-10) µm wide, lacking clamps, often with somewhat granular contents. Cells multinucleate. Branching is often inequivalent with much wider parent hyphae. Irregular swellings often present. Crystals typically present, bipyramidal to prismatic. Aerial hyphae hyaline, thin- to somewhat thick-walled, 3-6 µm wide, without clamps. Conidiophores 2.5-4 µm wide, sometimes arising from a much wider hypha, branched, each branch forming a terminal blastoconidium. Branching racemose to nearly sympodial. Conidia salmon when mature, thin- to somewhat thick-walled (up to 1.5 µm), subglobose to ellipsoidal or ovoidal, (4-)6-10(-12) x (4-)5-8 µm, broadly attached. Arthroconidia present, often originating from old conidiophores, cylindrical or irregular, thin-walled, 2.5-3.5 µm wide. Chlamydospores present, terminal or intercalary, subglobose to ellipsoidal, thickwalled (up to 2 µm), 10-21 x (7.5-)9-16 µm. Submerged hyphae hyaline, thin- to thick-walled, 2.5-12 µm wide, often constricted at the septa. Chlamydospores present, as above.
Nuclear behaviour: cells of young radiating mycelium multinucleate, those of aerial mycelium multinucleate, conidia with 2-8 nuclei.
Species code (Stalpers, 1978): (7), (8), (9), 11, 13, 14, 18, 19, (21), (22), 23, 31, (32), 35, 48, 50, 52, 53, 54, 55, (78), 80, (82), 83, 84, 85, 87, 87, (89), (90), 96.
Species code (Nobles, 1965): 1, 6, (7), (25), (26), 33, 34, 35, (36), (37), 38, 43-44, 54,55.
 
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