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 Add this item to the list  Polyporus umbellatus Pers. ex Fries
Page number:382 
Description type:Culture description 
Description:Polyporus umbellatus Pers. ex Fries
Cultural characters: (Pl. XIII, Fig. 8; Pl. XIV, Figs. 21 and 22).
Growth characters. Growth very slow, radius 4. 7 cm. or less in six weeks. Advancing zone slightly bayed, aerial mycelium uniform to limit of growth. Mat white, appressed, compact, velvety to coarse farinaceous appearance suggesting rough plaster. Reverse unchanged or "honey yellow" (2.0Y6.7/6.2) to "cinnamon-brown" (5.0YR3.0/3.0) below inoculum. Odor faint. On gallic and tannic acid agars diffusion zones very weak to moderately strong, no growth on either medium.
Hyphal characters. Advancing zone: hyphae hyaline, nodose-septate, the cells short, with numerous branches originating at and between septa, 3.0-4.5 µm diameter. Aerial mycelium: (a) hyphae as in advancing zone, soon fragmented to form (b) oidia of diameter equal to hyphae and of varying lengths frequently with clamp connection attached, 9.0-15.0 x 3.0-4.5 µm. Submerged mycelium: hyphae as in advancing zone.
Type of rot : white rot of broad-leaved trees.
Descriptions of cultural characters: Davidson, Campbell, and Blaisdell (64).
Polyporus umbellatus and P. squamosus fall together in the key and there appears to be no clearly defined character by which they may be separated.
Taxon name: