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 Add this item to the list   Vararia P. Karsten 1898
   
Description type:General description 
Description:Vararia P. Karsten 1898
Syn.: Asterostromella Höhn. & Litsch.
Incl. Scytinostroma Donk, Stereofomes Rick
Basidiome annual, sometimes layered (perennial) , effuse to effuse-reflexed, membranaceous to coriaceous, more rarely hard or crustose, not separable. Hymenium typically a catahymenium.
Hymenial surface even to warted, with cream, yellowish, ochraceous or brownish tinges. Hyphal strands rarely present. Trama sometimes darkening in KOH.
Hyphal system monomitic or dimitic with branched skeletal hyphae. Branched skeletal hyphae hyaline to yellowish or brown, thick-walled to solid, cyanophilous at least when young, dextrinoid (15-20 h. in ammonium at 60° C, then in Melzer's in 10% acetic acid) .
Dichohyphidia hyaline and cyanophilous when young, yellowish to brown when older, dextrinoid, repeatedly dichotomously branched, ultimate branches in the basal layer often long (and then often called dextrinoid binding hyphae or branched skeletal hyphae), in the (sub)hymenium relatively short, sometimes very short and coralloid. Unbranched skeletal hyphae absent.
Subicular generative hyphae hyaline, thin- to somewhat thick-walled, with or without clamps.
Gloeocystidia hyaline, thin- to thick-walled, ventricose or fusoid to subulate, often with a papilla (schizopapilla) , with resinous contents, SA+ or less frequently SA-; old gloeocystidia often display contracted globular or even crystalline contents and are always SA-.
Basidia hyaline, thin-walled, hyaline, thin-walled, utriform, more rarely clavate or subcylindrical, with (2-)4 sterigmata.
Basidiospores hyaline, globose, ellipsoid, ovoid, cylindrical, navicular or fusoid, thin-walled, smooth or warted to echinulate, amyloid, not amyloid or with amyloid suprahilar plage.
Substratum: parasitic or saprophytic on wood of angiosperms and gymnosperms, rarely on litter or soil, producing a white rot.
Type species: Radulum investiens Schw.
Distribution: worldwide
 
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