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 Add this item to the list   Laxitextum Lentz 1955
   
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Page number:70 
Remarks (internal):Initially the principal characters were, according to our interpretation, basidiomes typically reflexed, pileus lacking a cuticular layer, context spongy-fragile to spongy-coriaceous of loosely woven hyphae, hymenial surface even, hymenium continuous, and "basidia and spores approximate those of Stereum and Peniophora." In the original description no mention was made of the distinctive and taxonomically very important basidiospore features. The generic diagnosis is here emended to include the amyloid, roughened spores. Initially three species were included, T. bicolor, T. crassum Lev. and T. roseo-carneum Schw. Subsequently, the latter two were transferred to Lopharia and Dendrocorticium, respectively (see Ginns and Lefebvre 1993). Hjortstam and Ryvarden (1981) described two new species: L. incrustatum and L. lutescens.
The distinguishing features of the genus are: 1) amyloid, ornamented, ellipsoid, relatively small basidiospores, 2) sulfo-negative, cylindrical gloeocystidia, 3) cylindrical-clavate basidia, 4) duplex context, and 5) hyphae with clamp connections. Of the three species in Laxitextum, L. bicolor and L. incrustatum occur in North America
 
Description type:Non-original description 
Description:Laxitextum Lentz 1955
U.S. Dept. Agriculture Monograph 24: 18.
Type species Thelephora bicolor Pers.: Fr.
Basidiomes effuse to effuse reflexed, typically several cm long and broad, thin to 1 mm thick, soft and pliable, lignicolous or corticolous. Pileus surface brown, matted tomentose to somewhat hirsute, sometimes concentrically zonate. Hymenial surface smooth, pale yellow to grayish white. Subiculum pallid to brown, thin to nearly 1 mm thick, densely cottony, duplex. Hyphal system monomitic. Generative hyphae typically arranged in a layer parallel to and adjacent to the substrate, then becoming perpendicular to the substrate and slightly woven between the gloeocystidia and developing hymenium, with clamp connections, 2-5 µm diam, the walls hyaline or brown (in one species), thin to 1.5 µm thick, nonamyloid, acyanophilous. Gloeoplerous hyphae in the subiculum. Gloeocystidia cylindrical, sinuous, up to 200 x 5-10 µm; the walls hyaline, thin; the contents oily to granular and pale yellow in KOH, sulfo­negative. Basidia cylindrical to clavate, about 20-40 x 4-7 µm with four sterigmata. Basidiospores ellipsoid to broadly ellipsoid, about 4-5 x 3-4 µm, the walls hyaline, thin, amyloid, acyanophilous, verruculose to warty, with a minute apiculus.
 
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