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 Add this item to the list  Poria carbonica Overholts
Page number:386 
Description type:Culture description 
Description:Poria carbonica Overholts
Cultural characters: (Pl. XV, Fig. 3; Pl. XVI, Figs. 6 to 9).
Growth characters. Growth moderately rapid to slow, plates covered in four to six weeks. Advancing zone even, hyaline and appressed in zone up to 1.0 cm. wide. Mat white or with tinges of "pale chalcedony yellow" (9.0Y4.5/8.3), appressed, downy to woolly-felty, after three to four weeks producing raised balk of mycelium with cottony or velvety surfaces, along radii or scattered. Reverse unchanged. Odor of apples. On gallic and tannic acid agars no diffusion zones, colony 2.0-3.0 cm. diameter on gallic acid agar, no growth on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 1.5-3.0(-6.0) µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) conspicuous much-branched hyphae, the branches usually attached at right angles and frequently rebranched, the walk slightly thickened and rigid, lumina fairly brood and apparently empty, aseptate, 3. 0-6.0 µm diameter; (c) conidia numerous, borne singly at the tips of branches, which are usually narrower than the main hyphae, about 1. 5 µm diameter, thin-walled, broadly ovoid, slightly truncate at distal end, pointed at attached end, 7.0-9.0 x 4.5-7.0 µm; (d) chlamydospores numerous, intercalary and terminal, walls slightly thickened, broadly ovoid, 9.0-16.5 x 7.5-12.0 µm. Submerged mycelium: (a) hyphae as in advancing zone; (b) chlamydospores as in aerial mycelium; (c) crystals numerous, octahedral.
Type of rot: brown rot of western coniferous trees.
Descriptions of cultural characters: Nobles (117).
The key patterns for Poyia caybonica, showing chlamydospores, conidia, and the much-branched rigid hyphae known only in this species, stand alone in the key and the species is readily identified. Although they do not conflict in the key, mention should be made of the similarity between cultures of Fomes officinaLls and Porie carbonica, both of which produce large numbers of chlamydospores and conidia. However, the special hyphae of P. carbonica and its more rapid rate of growth are characters by which the two species are separated in the key. In addition, P. carbonica hos been reported only from British Columbia, Washington, and Oregon, so that it appears to be restricted to Western Canada and United States.
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