Search on : Taxa descriptions

 


   
Literature:
 
Page number:1229 
Remarks (public):Easily recognized thanks to its dark colour, red-brown margin and numerous dendrohyphidia. 
Description type:Non-original description 
Description:Punctularia strigosozonata (Schw.) Talbot, Bothalia 7:1 p. 143, 1958. - Merulius strigosozonatus Schw., Trans. Am. Phil. Soc. n.s. 4 p. 160, 1834. - Phlebia strigosozonata (Schw.) Lloyd, Myc. Writ. 4 p. 15, 1914. - Phaeophlebia strigosozonata (Schw.) W. Br. Cooke, Mycologia 48 p. 401, 1956.
Fruitbody resupinate or often reflexed, orbicular and confluent to rather large size, upperside of reflexed parts zonate with black brown concentric furrows of totally conglutinate hyphae, and lighter brown ridges, velutinous by projecting hyphal-ends; oldest part often ash-grey; margin bright yellow brown to reddish-brown; hymenium dark brown-violaceous, gelatinous in the wet living state, drying hard, in the youngest state smooth, then with elongate, radial ridges or irregular tubercules, when fertile with a whitish pruina of spore deposits.
Hyphal system monomitic; all hyphae with clamps, those of the upperside and next to the substrate pigmented brown, ab. 5 µm wide, often encrusted with lumps of excreted resinous matter, and forming a layer, 30-50 µm thick or sometimes more; major part of the trama composed of mainly hyaline, more or less horizontal hyphae with thick walls, swelling in KOH and with sparse clamps and branches, this layer reaching a thickness of 500-1000 µm; from this trama layer the subhymenium is formed, thickens with age to about 100 µm, composed of vertical, densely interwoven hyphae with thinner walls producing the basidia; in older fruit-bodies the hyphae producing the dendrohyphidia may become pigmented brown, other hyphae hyaline or slightly yellowish.
Cystidia none.
Dendrohyphidia numerous, richly branched, at first hyaline then yellowish and in older hymenia grey-brown, in the furrows between the hymenial ridges the hymenial layer may be formed by dendrohyphidia alone, in such spots sometimes covered with a layer of crystals, visible to the eye as white patches.
Basidia in the immature state tube-like, flexuose, when mature apically widened and projecting, 40-50(-80) x 4-5 µm, with 4 sterigmata; in hymenia with rich development of dendrohyphidia a catahymenium-like structure is formed.
Spores 6.5-8.5 x 3.5-4.5 µm, ellipsoid to ovate, adaxial side straight or somewhat convex, rarely slightly concave, smooth, thin-walled, new spores hyaline or yellowish, old enclosed spores brown, non-amyloid, non-cyanophilous.
Habitat. In N. Europe found only on Populus tremula and Alnus incana, in N. part of its area in N. America on Populus tremelloides, but in southern part of its distribution found on a number of different hosts (see W.B. Cooke loc. cit.).
Distribution. In N. Europe found only in Estonia (Parmasto, Mycoth. Est. fasc. 1 n. 8, 1957, map of distribution). Might occur in SE Scandinavia, e.g. in Gotland. Widely distributed in warm-temperate and tropical areas all over the world.
 
Taxon name: