Polyporales » Polyporaceae » Grammothele

Grammothele lineata

Grammothele lineata Berk. & M.A. Curtis. 1868, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps resupinate, adnate, up to 16 cm long, 5 cm wide and 1 mm thick, corky to coriaceous, without special odor or taste when fresh, becoming hard corky and light in weight upon drying. Pore surface bluish-gray to sordid gray; pores angular to irregular, 23 per mm; dissepiment thin, entire to lacerate, with plenty hyphal pegs; hyphal pegs often projecting out of tube walls, yellowish brown at base. Sterile margin white to pale pinkish. Subiculum corky, whitish to pinkish, becoming dark and resinous with age, very thin, about 0.2 mm thick. Tubes shallow, rigid corky when dry, concolorous with pore surface, up to 0.8 mm long. Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae dextrinoid, CB; tissues darkening in KOH. Generative hyphae infrequent, hyaline, thin-walled, 1.52.5 µm in diam; skeletal hyphae dominant, hyaline to pale brownish, thick-walled to subsolid, occasionally branched, interwoven, 12.5 µm in diam. Generative hyphae hyaline, thin-walled, occasionally branched, 22.6 µm in diam; skeletal hyphae dominant, thick-walled with a narrow lumen, occasionally branched, interwoven, 22.9 µm in diam. Cystidia and cystidioles absent. Dendrohyphidia richly present, hyaline, thin-walled, moderately to strongly branched. Basidia clavate, with four sterigmata and a basal clamp connection, 15.522.8 9 4.65.9 µm; basidioles mostly clavate, slightly smaller than basidia. Basidiospores oblong-ellipsoid, hyaline, thin-walled, smooth, IKI, CB, (4.4–)4.66.5(–6.8) × (2.5–) 2.63.2 lm, L = 5.55 lm, W = 2.9 lm, Q = 1.91 (n = 30/1).

Index Fungorum Number: IF168936

Notes: Grammothele lineata differs from G. fulgio by its bigger pores (23 per mm), and growth on the substrate of dicotyledonous trees.