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 Add this item to the list   Polyporus arcularius Batsch ex Fries
Page number:352 
Description type:Culture description 
Description:Polyporus arcularius Batsch ex Fries
Cultural characters: (PI. VII, Fig. 11; Pl. VIII, Figs. 29 to 32).
Growth characters-Growth rapid, plates covered in two weeks. Advancing zone even, hyaline and appressed in narrow zone. Mat white (one week), becoming "light brownish drab" (2.0YR4.7/1.8), "avellaneous" (8.0YR6.2/3.5), "vinaceous-fawn" t4.5YR6.7/3.5), with islands remaining white (two weeks), finally "light cinnamon-drab" (2.0YR5.8/1.8), "benzo brown" (2.5YR4.4/1.5), "light brownish drab" (2.0YR4.7/1.8), and "vinaceous drab" (10.0RP4.7/2.0), mottled, with some areas that remain white, the white parts slightly raised, woolly-felty, the colored areas felty to skinlike, brittle or cartilaginous, wrinkled. Reverse patchy, some areas bleached, remaining areas "honey yellow" (2.0Y6.7/6.2). Odor suggesting honey, and also yeasty. On gallic and tannic acid agars diffusion zones strong, trace of growth on gallic acid agar, 3.5 cm. diameter on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 2.2-3.0 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fiber hyphae numerous, frequently branched, with walls thick and refractive, the lumina visible only at bases of branches, 1.5-3.0 µm diameter; (c) hyphae from skinlike areas nodose-septate, the walls thickened so that lumina frequently disappear completely, buffy-brown in potassium hydroxide, with numerous short branches or knoblike projections, all interlocked to form a tissue so coherent that it is almost impossible to prepare mounts showing individual elements; (d) chlamydospores rare or apparently lacking, intercalary and terminal, thin-walled, 9.0-13. 5 x 6.0-7.5 µm. Submerged mycelium: (a) nodose-septate hyphae and (b) chlamydospores as described above.
Type of rot: white rot of broad-leaved trees.
Descriptions of cultural characters: Davidson, Campbell, and Blaisdell (64), Refshauge and Proctor (128), Vandendries (145).
This description is based on only one culture, which was isolated from a fruit body having the large pores typical of Polyporus arcularius. It resembles closely the cultures of P. brumalis, the key patterns of the two species being identical. The one culture of P. arcularius available appears to have distinct vinaceous tones and to be darker in color than the cultures of P. brumalis but this does not provide a satisfactory basis of separation. A further comparison of these two species in culture is necessary.

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