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 Add this item to the list   Polyporus conchifer (Schw.) Fries
Page number:359 
Description type:Culture description 
Description:Polyporus conchifer (Schw.) Fries
Cultural characters: (PI. IX, Fig. 5; Pl. X, Figs. 16 and 17).
Growth characters. Growth rapid to moderately rapid, plates covered in two to three weeks. Advancing zone even, at first hyaline and appressed, later with slightly raised woolly mycelium extending to limit of growth. Mat white, uniform, appressed, subfelty to floccose or somewhat tufted except in parts remote from inoculum where it is raised, woolly, grown against side of Petri dish. Reverse unchanged at first, then bleached. Odor none. On gallic and tannic acid agars diffusion zones strong, no growth on gallic acid agar, trace to 2.0 cm. diameter on tannic acid agar.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, 1.5-6.0 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone; (b) fiber hyphae with walls thick and refractive, lumina apparently lacking, 1.5-2.2 µm diameter, with curving whiplash-like ends, closely interwoven to form tough mat. Submerged mycelium: (a) hyphae as in advancing zone, frequently branched; (b) crystals needlelike.
Type of rot: white rot of dead branches, usually of Ulmus spp., rarely of other broad-leaved trees.
Descriptions of cultural characters: Davidson, Campbell, and Blaisdell (64).
Polyporus conchifer has no distinctive Cultural characters, and it is difficult to find any criteria by which this species may be differentiated from others with which it coincides in the numerical key. In the descriptive key, the textures of the mats of the different species have been used as a basis for separation. The subfelty to floccose mat of P. conchifer and the fact that it usually occurs on dead branches of Ulmus spp. may make possible the recognition of cultures of this species.
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