Chlorophyllum molybdites

False Parasol Foraging & Identification Guide

The False Parasol (Chlorophyllum molybdites), also known as the 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 after warm summer rains, it is famously named for its unique dull-green gills (when mature) and green spore print. Because it closely resembles edible parasol mushrooms and common white button mushrooms, it is notoriously known as the most frequent cause of severe 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 💀

Botanical macro photography of False Parasol (Chlorophyllum molybdites) - Plant AI care database

How to Identify False Parasol

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Key Visual Features: A very large, stately mushroom that grows exclusively in grass (never on wood). The cap starts as a sphere and expands flat (often 10-20 cm across). It is whitish but covered in coarse, brownish, shaggy scales, particularly concentrated at the dark brown center. The thick white stem features a prominent, thick, double-edged ring that can often slide up and down the stem.
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Spore Print & Gills/Pores: CRITICAL SAFETY CHECK: The defining feature of this mushroom is the color of its mature gills and spores. While young gills are white, as they mature they turn a distinct grayish-green or olive-green. Taking a spore print will yield a pale olive-green print, which is highly unusual and confirms the identification instantly.
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Common Confusions: Extremely dangerous because it is frequently mistaken for edible species like the true Parasol Mushroom (Macrolepiota procera) and the Shaggy Parasol (Chlorophyllum rhacodes), both of which have white spore prints and never turn green. It is also often eaten by inexperienced foragers who mistake young specimens for edible meadow mushrooms (Agaricus campestris) or store-bought white button mushrooms.

💡 Plant AI Tip: ⚠️ 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 & Foraging Guide

Follow our detailed scientific field guide and environmental parameters to identify and study False Parasol safely.

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.

Common Look-alikes & Foraging Danger

Pale White Gills

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

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.

Fairy Ring Grass Death

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

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.