Identify False Parasol (Chlorophyllum molybdites) - Plant AI mycology guides
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False Parasol

Scientific Name: Chlorophyllum molybdites

The False Parasol, or Green-Spored Lepiota, is a large, highly common toxic mushroom widely distributed across lawns, parks, and suburban meadows in North America and subtropical regions. Growing in spectacular 'fairy rings' on grassy turf, it is named for its unique dull-green gills and green spore print. Because it closely resembles edible parasol mushrooms, it represents the most common cause of gastrointestinal mushroom poisoning in North America.

🌍 Environment Grassy Lawns & Parks
💧 Humidity Moderate Humidity (60-70%)
🪵 Substrate / Host Rich Soil / Grassy Turf
📏 Size 10cm - 30cm
🍄 Category Highly Toxic 💀
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How to Identify

A large whitish cap with brown scales, crowded gills that turn pale green-gray when mature, and a sturdy stem with a double ring.

  • Scattered Brown Scales: Large, white cap covered in coarse, irregular brownish scales concentrated at the center.
  • Green Spore Gills: Gills are free, initial white, turning a unique dull pale green to olive-gray as spores mature.
  • Double Movable Ring: A tall, sturdy white stem featuring a thick, double-flanged ring that can be slid up and down.
⚠️ ICU Alert: The most common cause of mushroom poisonings in North America. Causes severe, violent vomiting, bloody diarrhea, and dehydration. Often grows in large 'fairy rings' on suburban lawns.

Detailed Mycology Profile & Safety Guide

Click on any dimension to expand detailed field guides, substrate requirements, and safety warnings.

Grows on rich, dung-enriched suburban lawns, grassy fields, golf courses, and park meadows. It frequently forms massive, perfect circular 'fairy rings' on grass turf.
Requires warm, humid summer weather to fruit. Often emerges rapidly in large numbers on suburban lawns after heavy summer thunderstorms.
Thrives in open, bright sunny lawns and fields, tolerating full direct sunlight better than most wild forest mushrooms.
The cap is exceptionally large, 10 to 30 cm, dry white with brown scales. Gills are free, crowded, turning from white to dull pale green-gray in age.
Produces a highly unique dull green-to-olive-gray spore print. This is the only green-spored mushroom in temperate lawns.
Flesh is thick, white, bruising slightly red-brown when cut. Stem is tall, hollow, off-white, featuring a thick, movable double ring but completely lacking a base volva.
NEVER harvest. Grassy lawn mushrooms showing any greenish gills must be avoided completely. Keep pets and children away from suburban lawn rings.
Highly toxic. Ingestion triggers severe, violent gastrointestinal syndrome. Toxins are heat-stable, and cooking does not make it safe.
Contains a toxic protein called **molybdophyllysin**, a metalloendopeptidase that causes severe mucosal irritation and violent gastrointestinal inflammation.
CRITICAL WARNING: Extremely dangerous look-alike! Often mistaken for the choice edible **Parasol Mushroom** (Macrolepiota procera) or the **Shaggy Parasol** (Chlorophyllum rhacodes). True Parasols have **white to cream gills** and a **white-to-tan spore print**, whereas the False Parasol develops **greenish gills** and a **dull green spore print**. Always perform a spore print!
Because False Parasol grows abundantly on suburban lawns where families play, it is the primary culprit for accidental dog and toddler mushroom poisonings. Simply kick or remove the lawn mushrooms and dispose of them to keep pets safe.
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Pale White Gills

Symptoms: Young mushrooms in a lawn ring have pure white gills, with no hint of green.

Action: Action: Do not trust young specimens. False Parasols only develop green gills when they mature and produce green spores. Young caps look identical to edible puffballs or parasols. Always wait for a spore print.

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Fairy Ring Grass Death

Symptoms: A perfect ring of dark green grass with a dead zone of dried grass inside, where mushrooms emerge.

Action: Action: This is a natural fairy ring behavior. The dense underground mycelium blocks water from reaching grass roots. Aerate the lawn and water heavily to help the grass recover.

Frequently Asked Questions

Why is this mushroom called the 'False Parasol'?

It is named 'False Parasol' because it looks almost identical to the highly prized edible Parasol Mushroom (Macrolepiota procera) in cap size, brown scales, and stem ring, but carries severe toxins.

What happens if you eat a False Parasol?

Within 1 to 3 hours, it triggers extremely violent gastrointestinal distress: severe abdominal pain, explosive watery and bloody diarrhea, vomiting, and extreme dehydration, often requiring hospitalization.

Can cooking make the False Parasol safe to eat?

No. The toxic protein molybdophyllysin is highly heat-resistant and cannot be deactivated or broken down by boiling, baking, pan-searing, or drying. It remains highly toxic.

How do you distinguish it from the Shaggy Parasol?

Perform a spore print: the False Parasol produces a unique dull green spore print, whereas the Shaggy Parasol (Chlorophyllum rhacodes) produces a pure white spore print and its flesh stains bright saffron-red when cut.

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