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 Add this item to the list  Daedalea quercina L. ex Fries
Page number:316 
Description type:Culture description 
Description:Daedalea quercina L. ex Fries
KEY PATTERN: 1 1 2 1 9 1 2 2 2 (1,2) 2
CULTURES EXAMINED: CANADA.Ontario: Morton, on Quercus sp., F2278; Ottawa, on Quercus sp., F676. UNITED STATES. North Carolina: F2158.
Cultural characters: (Pl. I, Fig. 6; Pl. 11, Figs. 18 to 24).
Growth characters. Growth moderately rapid, plates covered in four weeks. Advancing zone even, fibers appressed, closely arranged, radiating. Mat white, newest growth woolly floccose, becoming appressed, woolly-felty, with slightly raised reticulations, producing a "towelled" (Cartwright and Findlay) effect, frequently fruiting over raised tufts after five to six weeks. Reverse unchanged. Odor strong at three to four weeks, fruity. On gallic and tannic acid agars no diffusion zones, diameters 2.0-3.0 cm on both media.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, frequently branched at and between septa, with occasional branches directed backward from posterior part of clamp connection, 1.5-4.5 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone, frequently with walls irregularly thickened and lumina relatively narrow, up to 6.0 µm diameter; (b) fiber hyphae numerous in cultures five to six weeks old, with walls thick and refractive, lumina narrow or apparently lacking, occasionally branched, aseptate, 2.2-3.0 µm diameter; (c) chlamydospores numerous, broadly ovoid, with thick walls, 12.0-18.0 µm diameter. Fruit body: (a) thin-walled hyphae and (b) fiber hyphae as in aerial mycelium; (c) basidia 4.5-6.0 µm diameter, bearing four sterigmata up to 6.0 µm long; (d) basidiospores hyaline, even, oblong ellipsoid to cylindric, slightly flattened on one side, 6.0-8.0 x 2 .5-3.0 À¬m. Submerged mycelium: (a) nodose-septate hyphae up to 8.0 µm diameter and (b} chlamydospores as in aerial mycelium; (c) crystals numerous, octahedral.
Type of rot: brown cubical rot of broad-leaved trees, especially Quercus spp.
Descriptions of cultural characters: Badcock (3), Cartwright and Findlay (51, 52, 53, 56), Davidson, Campbell, and Blaisdell (64), Humphrey and Siggers (92), Walek-Czernecka (150).
Cultures of Daedalea quercina have key patterns identical with those for a number of other species. In the inserted descriptive keys are noted differences in color and topography of the mats, and in chlamydospores and basidiospores, which should serve to distinguish the different species. Cultures of Daedalea quercina are similar to those of Poria monticola but the early formation of typical foliose fruit bodies by most cultures of the latter species makes its cultures readily recognizable.
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