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 Add this item to the list   Polyporus brumalis Pers. ex Fries
Page number:356 
Description type:Culture description 
Description:Polyporus brumalis Pers. ex Fries
Cultural characters: (PI. IX, Fig. 1; Pl. VIII, Figs. 49 and 50).
Growth characters. Growth rapid to moderately rapid, plates covered in two to three weeks. Advancing zone even, hyaline and appressed in zone 1.0-2.0 mm. wide. Mat white with scattered areas of "light vinaceous-cinnamon" (6.0YR6.8/4.3), "vinaceous-cinnamon" (6.5YR6.8/5.5), "cinnamon-buff" (9.0YR6.6/5.8), "tawny-olive" (8.0YR4.8/5.8), and "sayal brown" (7.0YR5.0/5.5) (two weeks), these increasing in extent and coalescing until whole surface is colored and mottled, or only isolated islands of white remain, the white areas appressed cottony to raised woolly, occasionally sectored, the colored areas skinlike and wrinkled. Reverse unchanged or bleached. Odor faint. On gallic and tannic acid agars diffusion zones strong, no growth on gallic acid agar, diameter 2.0-2.5 cm. on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 1.5-4.5 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fiber hyphae numerous, with walls thick and refractive, lumina narrow or apparently lacking, aseptate, branched, 1.5-3.0 µm diameter; (c) hyphae from skinlike areas nodose-septate, with numerous branches, repeatedly branched or with small knoblike projections, so compactly arranged that it is almost impossible to prepare mounts showing individual elements. Submerged mycelium: (a) hyphae as in advancing zone, frequently branched; (b) Chlamydospores found only in F1554, rare, terminal and intercalary, thin-walled, 9.0-13.5 x 6.0-9.0 µm).
Type of rot: white rot of broad-leaved trees.
Descriptions of cultural characters: Davidson, Campbell, and Blaisdell (64).
As has been stated under Polyporus arcularius, no satisfactory basis for separating that species from P. brumalis has been arrived at in the present study, although the vinaceous tones of the former, and the clearer brown color of the Latter species may be sufficiently constant to be of diagnostic value. One of the key patterns of P. brumalis coincides with those for Collybia radicata and Daedalea confragosa, but the colors of the mats of these, as noted in the descriptive key, are so different from those shown by Polyporus brumalis, as to permit separation.
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