- fruiting bodies are up to 20cm wide, shelf-like, rubbery, sulphur yellow to orange, sometimes with bright orange tips.
- older specimens become pale and brittle, chalk-like.
- flesh is white to yellow tinted, firm, softer towards the edges.
- underside is characteristically white to bright yellow, with tiny pores instead of gills.
- has no stem.
- grows in overlapping groups on logs, stumps, or wounds of trees.
- appears in spring, summer, and fall.
- has a mild taste and odor; cook before eating.
- tip: harvest the soft outer margin of the younger specimens to avoid bitterness.
- an inedible (but not poisonous) look-alike is Pycnoporus cinnabarinus, which is corky/rigid rather than rubbery, and orange/red on the top and underside, rather than bright yellow on the underside.
- an inedible (but not poisonous) look-alike is Hapalopilus nidulans, which is cinnamon brown/orange on the top and the underside, rather than bright yellow on the underside.
- warning: can cause allergic reaction in some people due to toxins absorbed from the tree; begin by sampling small amounts.