Cap:
- Convex when young, becoming flat or depressed with age
- 2–12 cm (0.8–4.7 in) in diameter
- Yellow to reddish-orange, covered in reddish-brown scales.
Gills:
- Attached to the stem
- White, becoming cream or pale yellow with age
- Closely spaced, often forked.
Stem:
- 5–15 cm (2.0–5.9 in) tall, 0.5–2.0 cm (0.2–0.8 in) thick
- Equal in width throughout its length
- Yellowish-orange, covered with reddish-brown scales.
Flesh:
- Firm and white, turning red when cut.
Odor:
- Mushroomy, aniseed, or cinnamon.
Spore print:
- White
Habitat and Distribution:
*Armillaria bulbosa* is found in woodlands throughout the world. It grows on the ground, often in association with conifers and hardwoods. It can form mycorrhizal relationships with the roots of trees.