Summary:
Features include flat growth on wood, a pinkish or flesh-colored pore surface that darkens on drying, horny consistency of the dried fruitbody, and microscopic characters. Wu(2) proposed a name in Physisporinus based on a reorganization of genera with molecular evidence. MycoBank, accessed August 30, 2018 gives the current name of Rigidoporus crocatus (Pat.) Ryvarden as Physisporinus crocatus (Pat.) F. Wu, Jia J. Chen & Y.C. Dai, but the online Species Fungorum, accessed the same day, gives that name as a synonym of Rigidoporus crocatus (Pat.) Ryvarden. The description is derived from Gilbertson(1).
Rigidoporus crocatus has been found in BC, WA, ID, NS, AK, AR, AZ, CA, FL, LA, MN, MT, NC, NM, NY, PA, SC, TN, VA, and WV, (Gilbertson).
Cap:
growing flat on wood, spread out up to 10cm, "tough, crisp when fresh, drying rigid and horny, easily separable"; margin fertile or sterile, then up to 0.2cm wide, buff, finely tomentose
Flesh:
up to 0.1cm thick, corky to rigid, not zoned; pinkish buff
Pores:
5-7 per mm, circular to angular, thin-walled; "flesh-colored or very light pinkish or pinkish-brown, drying pinkish brown to smoky gray"; tube layer up to 0.3cm thick, hard, horny, distinct, darker, pinkish-tan
Microscopic:
spores 3.5-5.5 x 3.5-5 microns, oval to nearly round, smooth, inamyloid, colorless; basidia 4-spored, 17-20 x 10-12 microns, broadly clavate, simple-septate at base; cystidia absent; hyphae monomitic, hyphae of subiculum 3-8.5 microns wide, thin-walled to thick-walled, simple-septate, gelatinizing on drying and difficult to separate, hyphae of trama 3-4 microns, similar
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