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 Add this item to the list   Polyporus amorphus Fries
Page number:351 
Description type:Culture description 
Description:Polyporus amorphus Fries
Cultural characters: (PI. VII, Fig. 9; Pl. VIII, Figs. 22 to 24).
Growth characters. Growth very slow, radius 3.0-4.0 cm. in six weeks. Advancing zone even, appressed and hyaline in zone 2.0-5.0 mm. wide. Mat white, appressed to slightly raised, compact felty to velvety, with surface somewhat farinaceous, becoming irregularly pored in some isolates. Reverse unchanged. Odor strong, sour. On gallic and tannic acid agars diffusion zones moderately strong to strong, no growth on either medium.
Hyphal characters. Advancing zone: hyphae hyaline, regular in appearance, nodose-septate, 1.5-3.0 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fiber hyphae numerous, walls thick and refractive, lumina narrow or apparently lacking, unbranched, aseptate, 3.0-4.5 µm diameter. Fruit body (a) basidia in organized hymenium or in clumps over surface, usually with oily contents that flow from injured cells and obscure mount, 4.0-5.0 µm diameter, bearing four spores; (b) basidiospores hyaline, even allantoid, 4.0 x 1.5 µm. Submerged mycelium: hyphae as in advancing zone, frequently with swellings up to 10.0 µm diameter, at first staining deeply in phloxine, then appearing empty and collapsed.
Type of rot: brown stringy rot of coniferous trees.
Whether or not the swollen cells that occur in the submerged mycelium of Polyporus amorphus cultures are included, the key patterns of the species are different from all others in the study. Hence no difficulty should be encountered in recognizing cultures of this species.

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