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 Add this item to the list   Poria xantha (Fries) Cooke
   
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Description type:Culture description 
Description:Poria xantha (Fries) Cooke
Cultural characters: (Pl. XV, Fig. 15; Pl. XVI, Figs. 46 to 48).
Growth characters. Growth moderately rapid, plates covered in three to four weeks. Advancing zone even, raised, scattered cottony fibers to limit of growth. Mat white, the newest growth raised, loosely arranged, cottony, then abruptly collapsed, aerial mycelium lacking, leaving shining surface, or limited to thin translucent film, sometimes with patches of cottony mycelium scattered over surface, and usually with cottony mycelium grown against walls of Petri dish remote from inoculum to top of dish, in some isolates forming minutely pored fruitmg surfaces after five to six weeks. Reverse unchanged. No odor. On gallic and tannic acid agars no diffusion zones (may be slight browning below inoculum), colony 2.0-6.0 cm. diameter on gallic acid agar, no growth or a trace on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 3.0-6.0 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone, frequently with walls or small parts of wall thickened and refractive, often broken into short lengths; (b) nonstaining segments of nodose-septate hyphae, with walls evenly thickened but lumina still visible, 1.2-3.1 µm. diameter; (c) chlamydospores rare or apparently lacking, usually intercalary, rarely terminal, with walls slightly thickened, 10.5-19.5 x 6.0-7.5 µm. Fruit body: (a) basidia 3.7 µm diameter, bearing four spores; (b) basidiospores hyaline, even, cylindric, slightly curved, 4.2-5.0 x 1.2 µm. Submerged mycelium: hyphae as in eenel mycelium.
Type of rot: brown cubical rot of coniferous and broad-leaved trees.
Descriptions of cultural characters: Badcock (3), Cartwright and Findlay (56), Davidson and Campbell (63), Humphrey and Siggers (92).
Each of the eiglit key patterns for Poyia xantha falls with a group of species with identical key patterns. In the inserted descriptive keys separations are based, in the main, on the topography and color of mats. The appearance of cultures of P. xantha is characteristic, the surface of older cultures appearing glazed, with aerial mycelium piled up at the edge of the Petri disli and frequently bearing fruiting surfaces.
 
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