Ischnoderma benzoinum

A polypore exclusive to conifers, with a dark brown cap having a whitish margin.

Dimitic hyphal system: skeletal-like hyphae dominant in the context, very thick-walled, 3-9 µm wide, unbranched; generative hyphae more abundant in the subhymenium, thin- to slightly thick-walled, 3-5 µm wide, septate with clamped septa.

Pileipellis hyphae parallelly arranged, with abundant brown intracellular pigment, and emergent rounded terminal elements.

Basidia small, 12-18 µm long and 4.5-6 µm wide, with basal clamps, 4-spored.

Spores not observed; according to literature smooth, hyaline, thin-walled, measuring 5-7 x 1.5-2 µm, inamyloid in Melzer's reagent.