Hexagonia tenuis

Appearance

The fruiting body or pileus of Hexagonia tenuis is a thin. leathery bracket growing from the side, or adpressed to the underside, of dead branches. The upper surface is velvety with concentric zones in various shades of fawn or tan, sometimes becoming mauve towards the edge. Fruitbodies are extremely persistent.
The pore surface or hymenium is more or less flat, with large shallow pores. Grayish-white when young, darkening to fawn from the center Pores are usually hexagonal and honeycomb-like.
The stem or stipe, when present, is lateral and short, sometimes dilating at the origin into a disk.

Basidiocarp annual to perennial, solitary or in clusters, pileate, some almost stipitate, 2-5 cm broad and wide and 1-3 mm thick. Pileus dimidiate, flabelliform to semicircular, flat when fresh, often bent when dry, upper surface glabrous, concentrically zoned, ochraceous, to pale snuff-brown, even sepia. Pore surface snuff-brown, hazel to milky-coffee, often with a grayish to ashy-bluish tint, pores angular to hexagonal, very variable, mostly 0.5-2 per mm, tubes up to 2 mm long. Context 0.1-1 mm thick, dark brown, rusty-brown to hazel. Hyphal system trimitic, generative hyphae clamped, hyaline and thin-walled, 1.5-3 μm wide, often collapsed. Skeletal hyphae yellow to plae brown, thick- walled with a distinct lumen, 3-7 μm in diam. Binding hyphae hyaline, thick-walled with indistinct lumen, 3-6 μm wide. Basidiospores cylindrical, hyaline, thin-walled, smooth, 14-20 × 4.5-6.5 μm, IKI-.

Naming

Hexagonia tenuis (Hook.) Fr. 1838.

Distribution

Pantropics

Habitat

Lignicolous causing white rot of wood.

Reproduction

Spores