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 Add this item to the list  Polyporus gilvus Schw. ex Fries
Page number:367 
Description type:Culture description 
Description:Polyporus gilvus Schw. ex Fries
Cultural characters: (Pl. XI, Fig. 2; Pl. XII, FigS. 1 to 6).
Growth characters. Growth moderately rapid, plates covered in three to four weeks. Advancing zone even, raised aerial mycelium extending to limit of growth. Mat white at first, slightly raised, short cottony, with the inoculum and some areas along radiating lines becoming "snuff brown" (7.0YR3.9/3.5), "Saccardo's umber" (9.0YR3.8/3.5), and "sepia" (7.0YR3.4/2.8), more compact, felty to velvety, in F1704 covered with minutely pored fruiting surface after three weeks. Reverse unchanged to "honey yellow" (2.0YR6.7/6.2) and "clay color" (10.0YR5.8/6.0) below colored mycelium. Odor lacking. On gallic and tannic acid agars diffusion zones strong, trace of growth on gallic acid agar, trace to 2.5 cm. diameter on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, thin-walled, with simple septa, frequently branched, 2.2-6.0 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone, in part with walls slightly thickened and yellow; (b) hyphae with thick, rigid, brown walls, branched, frequently occurring as isolated cells in otherwise hyaline hyphae, 3.0-6.0 µm diameter; (c) hyaline, nodose-septate hyphae occasionally observed. Fruit body: (a) dark brown hyphae as in aerial mycelium; (b) setae numerous, 20.0-33.0 x 4.5-7.0 µmx (c) basidiospores abundant, hyaline, even, oblong-ellipsoid, 4.0-5.0 x 2.0-2.5 µm. Submerged mycelium: hyphae as in advancing zone.
Type of rot: white rot of broad-leaved or, rarely, coniferous trees.
Descriptions of cultural characters : Davidson, Campbell, and Blaisdell (64), Davidson, Campbell, and Vaughn (67), Hirt (84), Refshauge and Proctor (128).
In cultures of Polyporus gilvus the formation of setae is restricted to the fruiting surfaces. Therefore setae are included under "special structures" only in the key patterns in which fruiting is also listed, and the four key patterns showing this combination of characters fall alone in the key. Hence, when fruiting occurs, there should be little difficulty in identifying cultures of P. gilvus. The four key patterns that show no "special structures" and no fruiting are identical with the key patterns for several other species, among which separations must be based on color and texture, as noted in the descriptive keys. In some cultures rare nodose-septate hyphae were observed, but their formation seemed to be too erratic to warrant inclusion in the key.

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