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Page number:218 
Remarks (public):In its typical form with a cinnamon pore surface and a tomentose brown pileus, this species is easy to recognize. Old specimens become brown on the pore surface, but have smaller pores than those of C. gallica. Often it is found in an effused-reflexed condition. 
Description type:Non-original description 
Description:Coriolopsis rigida (Berk. & Mont.) Murr., North Am. FI. 9:75, 1908. Trametes rigida Berk. & Mont., Ann. Sci. Nat. Ser. 2,1 1 :240, 1849.
Basidiocarps annual, pileate, sessile single or laterally effused or connate and elongated, frequently with decurrent tube layer, up to 4 cm wide and 15 cm long in fused fruitbodies, the resupinate tube Iayer widely effused for several dm in some cases, up to 1 cm thick at the base, margin entire, crenulate, lobed or dentate, undulating and sharp. Pileus ochraceous to deep hazel brown or frequently grayish-brown, hirsute to tomentose, even hispid at the base as the tomentum may become agglutinated to form erect protuberances, but in some specimens also more or less flattened to an adpressed tomentum, but usually somewhat scrupose in old specimens, distinctly to indistinctly zonate, often in rather broad zones, 1-5 mm wide, also somewhat radially striate, pore surface cinnamon-brown, often with a slight bluish-ashy gray tint, in old specimens more tobacco to grayishbrown, pores round to angular, entire, 2-4 (5) per mm in old specimens and on the decurrent tube layer frequently larger and elongated radially, up to 1-2 mm long, old fruitbodies may become dentate and split in the pore surface, tubes concolorous with the pore surface in the tube walls, in the trama dark brown, thus the trama and the tubewalls are contrasting, up to 6 mm deep in thick specimens, context distinctly duplex, lower part dense, tobacco-brown and shiny fibrous when sectioned, up to 4 mm thick, upper part looser and floccose, more grayish-brown, in some specimens the two parts are separated by a thin black layer, which is rather irregular and frequently absent, trama and context black with KOH.
Hyphal system trimitic, generative hyphae hyaline, thin-walled and with clamps 1.5-4 µm in diameter, often collapsed and distorted in preparations, skeletal hyphae abundant, yellow to almost golden, thick-walled, 3-8 µm wide, in the context lighter and more thin-walled, binding hyphae thin-walled to slightly thick-walled 1.5-4 µm in diam hyaline to yellowish, irregular in outline, with numerous relatively short tapering branches.
Cystidia or other sterile elements absent.
Basidia clavate, 18-25 x 6-8 µm.
Basidiospores cylindrical, hyaline, smooth and thin-walled, IKI-, 8-11 (14) x2.5-4 (5) µm usually varying within the same collection.
Type of rot. - Causes a white rot.
Cultural characteristics. - Unknown.
Sexuality. - Unknown.
Substrata. - On dead wood of numerous genera of deciduous trees such as Acer etc. rarely on conifers.
Distribution. In southeastern U.S., common in the Gulf Coast region and southward into the tropical forest regions.
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