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 Add this item to the list   Inonotus dryadeus (Pers.:Fr.) Murrill
   
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Page number:48 
Remarks (internal):Inonotus dryadeus can be readily distinguished by its large basidiocarps, subglobose, hyaline dextrinoid spores, and strongly ventricose, hooked setae. Basidiocarps typically develop at the ground line at the base of infected trees or from roots at some distance from the base. 
Description type:Non-original description 
Description:Inonotus dryadeus (Pers.:Fr.) Murrill
North Am. Flora 9:86, 1908. - Polyporus dryadeus Pers.: Fr., Syst. Mycol. l:374, 1821. - Boletus dryadeus Pers. Observ. Mycol. 2:3, 1796.
Basidiocarps annual, sessile, solitary or imbricate, applanate, dimidiate, up to 23 x 35 x 15 cm, upper surface buff to dark brown, very finely tomentose or glabrous, azonate, becoming rimose with age, margin concolorous or sometimes ivory, pore surface buff, often with exuding droplets of amber liquid in fresh specimens, becoming dark brown and cracking with age, the pores circular or angular, 4-6 per mm, with thin, entire dissepiments, context bright yellowish-brown at first to reddish-brown in older specimens, soft, fibrous, zonate, cut surface appearing distinctly mottled because of streaks of darker softer tissue, up to 10 cm thick, tube layer concolorous, up to 2 cm thick.
Hyphal system monomitic, hyphae pale brown in KOH and thin-walled to dark brown and thick-walled, with occasional branching, 5-14 µm in diam, with a gummy incrustation in some areas, tramal hyphae uniformly pale brownish, thin-walled to moderately thick-walled, with rare branching, 5-9 µm wide.
Hymenial setae usually frequent, rare in some specimens, ventricose, usually hooked, 25-40 x 9-11 µm.
Basidia broadly clavate to ovoid, 4-sterigmate, l0-30 x 9-11 µm.
Basidiospores subglobose hyaline, becoming thick-walled, dextrinoid in Meltzer's reagent, 6-8 x 5-7 µm.
Substrata. In Eurasia and Eastern North America it is most common on Quercus spp., but in the south-western U.S. Mexico, and in the Pacific Coast Region it is primarily on Abies spp. It is particularly common in stands of Abies in northern California, otherwise also seen on Cedrus, and Pinus.
Distribution. Circumpolar in the temperate zone.
 
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