Egghead Mottlegill (Panaeolus semiovatus var. semiovatus)

semiovatus

About this plant

Panaeolus semiovatus var. semiovatus, commonly called the Egghead Mottlegill, is a small to medium-sized mushroom with a distinctive egg-shaped cap that becomes more flattened with age. It typically grows on rich, grassy soils, often in pastures or lawns. This species is saprotrophic, meaning it feeds on decaying organic matter, helping break down nutrients in the soil. It is not commonly cultivated for food and should be handled with care as some Panaeolus species contain psychoactive compounds.

Taxonomy

Family
Bolbitiaceae
Genus
Panaeolus
Plant type
Perennial
Lifespan
Perennial

Higher classification: Agaricales (order)

Origin & Distribution

Native region
Europe, North America
Distribution
Widely found in temperate regions across Europe and North America, often in grassy fields and lawns.

Care

Partial shade Light
2–5 days Watering
5–30 °C Temperature
High Humidity
Medium Care difficulty
Suitable locations
Outdoor, Greenhouse
Preferred window facing
North-facing, East-facing
USDA hardiness zones
3-9
Soil pH
6.0-7.5 (neutral to slightly acidic)
Soil type
rich, well-draining soil with organic matter

Watering. Keep the growing area moist but avoid waterlogging. Water when the top layer of soil feels dry to the touch.

Fertilizing. Since this mushroom grows on decaying organic matter, adding compost or manure-rich soil can encourage growth. No special fertilizing is needed beyond providing a nutrient-rich substrate.

This mushroom grows naturally in nutrient-rich soils, especially in grassy areas like lawns or pastures. It prefers moist conditions but does not require much maintenance. Avoid overwatering to prevent mold growth and keep the area well-ventilated.

Propagation

Propagation methods
Seeds

Ornamental features

Flowering
No

Not typically grown for ornamental features; has a small, smooth, egg-shaped cap that is pale to brownish.

Toxicity & Safety

Toxic to humansMildly toxic
Toxic to petsMildly toxic
Weed potentialNot considered a weed

Some Panaeolus mushrooms contain psychoactive compounds and should not be consumed unless properly identified by an expert. Keep away from children and pets.

Allergy information

Low Allergy risk
None Pollen level

Panaeolus semiovatus var. semiovatus is a type of mushroom and is not known to cause typical plant allergies like pollen allergies. However, some people may be sensitive to mold spores from fungi. It's best to avoid inhaling spores if you have mold allergies.

Common problems

Problems can include drying out if the soil is too dry or rotting if the area is too wet and poorly drained. Contamination by other fungi can also occur in cultivation.

Uses

Primarily ecological, helping decompose organic matter in soil. Not commonly used for food or medicine due to potential toxicity.

Notes

If cultivating, maintain moist but not waterlogged conditions and good air circulation to prevent contamination. Handle with gloves if unsure about toxicity.

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