Pileus: semicircular; 20 – 40 mm radius; surface irregular, concentrically grooved; white; margin acute.

Stipe: absent, laterally attached.

Gills: white, anastomizing (branching).

Flesh: thick, tough.

Spore print: white.

Spores:.

Notes: this fungus grows on tree trunks and logs and is recognizable by white cap and anastomizing gills. Difficult to separate from L. acuta.