Agaricus xanthodermus
mushrooms·@worldwildflora·
0.000 HBDAgaricus xanthodermus
After a long time without posting, I'm trying to get back to it. My newest passion - the fascinating world of mushrooms.
Today I'm introducing you to a mushroom - Agaricus xanthodermus - very often confused with Agaricus campestris or Agaricus arvensis.
 
**Agaricus xanthodermus**, commonly known as the **yellow-staining mushroom**, is a species of fungus belonging to the genus _Agaricus_. It is notable for being mildly toxic and should not be consumed. Here's an overview of its characteristics:
**Identification Features:**
1. **Cap**:
- Size: 5–15 cm in diameter.
- Color: White, with a smooth surface.
- Shape: Starts as convex and flattens with age.
- Staining: Yellow discoloration, particularly at the margin when bruised or cut.
2. **Gills**:
- Color: Initially pink, turning brown with maturity as spores develop.
- Attachment: Free from the stem.
3. **Stem (Stipe)**:
- Length: 5–10 cm.
- Thickness: 1–2 cm.
- Color: White, with a ring near the top.
- Staining: Turns yellow when handled or cut, especially at the base.
4. **Odor**:
- A distinct unpleasant smell reminiscent of phenol, carbolic soap, or ink.
5. **Spores**:
- Color: Brown.
- Shape: Elliptical.
**Habitat:**
- Found in grassy areas such as meadows, lawns, and parks.
- Appears singly or in groups, often in late summer and autumn.
**Toxicity:**
- Causes gastrointestinal distress, including nausea, vomiting, and diarrhea, in some individuals.
- The toxic compound is phenol, responsible for the distinct odor and yellow staining.
**Key Distinction:**
- It resembles edible species like _Agaricus campestris_ and _Agaricus arvensis_, but its yellow staining and phenolic odor set it apart.
If you're foraging mushrooms, ensure careful identification to avoid accidental ingestion of toxic species like _Agaricus xanthodermus_. When in doubt, consult an expert!