Flammeopellis bambusicola

Flammeopellis bambusicola Y.C. Dai, B.K. Cui & C.L. Zhao 2014, in Cui, et al., Fungal Diversity 97, 137–392 (2019)

Diagnosis: Basidiocarps annual, laterally stipitate, solitary or gregarious, soft corky and without odor or taste when fresh, becoming corky upon drying. Pilei more or less semicircular to spathulate, projecting up to 7 cm, 5 cm wide and 4 mm thick at center. Pileus convex, pileal surface bearing a reddish-brown cuticle which becoming dark reddish brown with age, irregularly rough, with distinctly sulcate. Pore surface white when fresh, white to cream upon drying; pores round, 6–7 per mm; dissepiments thick, entire. Sterile margin narrow, cream to pale brown, up to 1 mm wide. Context white to cream, corky, up to 1.5 mm thick. Tubes concolorous with pore surface, corky, up to 2.5 mm long. Stipe distinctly reddish, corky, up to 4.5 cm long, 1.5 mm in diam. Hyphal system dimitic; generative hyphae frequently with simple septa, occasionally bearing clamp connections; skeletal hyphae strongly dextrinoid, CB+; tissues unchanged in KOH.  Generative hyphae infrequent, hyaline, thin-walled, occasionally branched, 3.5–5µlm in diam; skeletal-walled, 10–14 × 3–4 µm. Basidia clavate to barrel-shaped, with four sterigmata and a basal clamp connection, 15–16 × 5–6.5 µm; basidioles dominant, in shape similar to basidia, but slightly smaller. Generative hyphae infrequent, hyaline, thin-walled, occasionally branched, 3.0–5.0 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide lumen, unbranched, interwoven, 3.5–6 µm in diam. Basidiospores ellipsoid to drop-shaped, pale yellowish, thick-walled, smooth, weakly dextrinoid, CB+, (4.3–)4.5–5.1(–5.4) 9 (3.3–)3.5–4 (–4.2) µm, L = 4.83 µm, W = 3.8 µm, Q = 1.25–1.28 (n = 60/2).

Index Fungorum Number: IF807158

Notes:  Flammeopellis bambusicola is characterized by an annual growth habit, laterally stipitate basidiocarps with a reddish brown cuticle at pileal surface, a dimitic hyphal system with generative hyphae frequently with simple septa, occasionally bearing clamp connections, strongly dextrinoid, cyanophilous, unbranched skeletal hyphae, and ellipsoid to drop-shaped, pale yellowish, thick-walled, smooth, weakly dextrinoid and cyanophilous basidiospores (4.5–5.1 9 3.5–4 µm, Zhao et al. 2014).