Polyporales » Polyporaceae » Picipes

Picipes badius

Picipes badius (Pers.) Zmitr. & Kovalenko 2016, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps annual, centrally to laterally stipitate, solitary or clustered, soft leathery in juvenile specimens and leathery in mature fresh specimens, becoming fragile in juvenile specimens and hard corky in mature dry specimens. Pilei fan-shaped, semicircular to circular with a depressed center, up to 17 cm in diam and 1.5 cm thick at base. Pileal surface white to gray in juvenile specimens and light brown, reddish-brown, brown, chestnut to blackish brown in mature fresh specimens, becoming to buff to yellowish-brown in juvenile specimens and tan, chestnut to black in mature dry specimens, always darker in the center, glabrous, azonate, occasionally with radial stripes; margin sharp, straight when fresh and straight to incurved upon drying. Pore surface white to cream when fresh and buff yellow when dry; pores round to angular, 610 per mm; dissepiments thin, entire to slightly lacerate. Context white when fresh and white to buff when dry, up to 1.3 cm thick. Tubes concolorous with pore surface, decurrent, less than 2 mm long. Stipe covered with a black cuticle, glabrous, up to 3.6 cm long and 1.7 cm in diam. Hyphal system dimitic; generative hyphae simple septate; skeletal hyphae IKI, CB +; tissues unchanged in KOH. Generative hyphae hyaline, thin-walled, frequent in juvenile specimens, scattered in mature ones, occasionally branched, 2.58 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen in juvenile specimens while subsolid in mature ones, moderately branched, interwoven, 26 µm in diam. Hyphae in cuticle slightly thick-walled with simple septa, unbranched, with ivory to buff inclusion, parallel arranged into a palisade, 48.5 µm in diam. Generative hyphae hyaline, thin-walled, frequent in juvenile specimens while infrequent in mature ones, infrequently branched, 35 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen in juvenile specimens while subsolid in mature ones, dendritically branched, strongly interwoven, 1.56 µm in diam. Cystidia absent; cystidioles infrequent, subulate, hyaline, thin-walled, 1316.5 × 4.55.5 µm. Basidia clavate, with four sterigmata and a basal simple septum, 11.520 × 68 µm; basidioles in shape similar to basidia, but smaller. Generative hyphae hyaline, thin-walled, frequent in juvenile specimens while infrequent in mature ones, occasionally branched, 2.58.5 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen in juvenile specimens while subsolid in mature ones, moderately branched, interwoven, 1.59 µm in diam. Hyphae in cuticle thick-walled with a wide lumen, simple septate, occasionally branched, with buff to yellowish- brown inclusion, 48.5 µm in diam. Basidiospores oblong to cylindrical, hyaline, thin-walled, smooth, IKI, CB, (5.2–)5.58(–8.6) × (2.8–)33.8 µm, L = 6.42 µm, W = 3.13 µm, Q = 1.782.7 (n = 150/4).

Index Fungorum NumberIF812028

Notes: The dark brown pileal surface and simple-septate contextual generative hyphae are the diagnostics of P. badius. The simple-septate connections are not easy to observe in trama and context, but they seem to be common in stipe.