Amanita manginiana

🏷️ Description

Amanita manginiana, also known as Mangin’s False Death Cap or Chiu’s False Death Cap, is a rare and poorly understood mushroom originally described from Vietnam in 1914. It has since been found in China and Japan, where a similar species is sometimes sold in local markets. Though some sources report it as edible with potential medicinal properties, its resemblance to deadly Amanita species makes consumption risky.

🔎 Identification

🔹 Cap – 1.97 to 7.87 inches (5 to 20 cm) wide, convex to flat, chestnut brown to dark gray, darker at the center, often smooth but sometimes with white volval remnants. Silky and non-striate at the margin.

🔹 Gills – White, free to slightly attached, with shorter gills interspersed.

🔹 Stem – 1.97 to 5.91 inches (5 to 15 cm) tall, cylindrical, white with farinose (powdery) squamules, often turning orangish-brown. The base is bulbous (ventricose to clavate).

🔹 Ring – White, skirt-like, delicate, and easily broken.

🔹 Volva – Membranous, limbate (forming a distinct rim), white to dirty white.

🔹 Spores – Small (6–10 µm), subglobose to broadly ellipsoid, amyloid (staining with iodine).

🌏 Habitat & Distribution

Amanita manginiana thrives in warm, forested regions, often forming symbiotic relationships with trees. It has been recorded in:

📍 Vietnam – First described in 1914.

📍 China – Particularly in southwestern regions, where it is sometimes sold in markets.

📍 Japan – Recently reported.

It is commonly found in mixed forests, growing in soil rich in organic matter, often near broad-leaved trees.

👀 Look-Alikes

1️⃣ Amanita phalloides (Death Cap) ☠️

The infamous Death Cap is one of the most poisonous mushrooms in the world. It shares similar features like a white stem, white gills, and a pale, smooth cap. The key differences are in the volva (which is often more distinct in A. phalloides) and the ring, which is more persistent in the Death Cap.

2️⃣ Amanita virosa (Destroying Angel) 💀

This deadly mushroom also has a white cap, stem, and gills. Amanita virosa is known for its pure white appearance and is often found in the same habitats as A. manginiana. The most distinguishing feature is its volva, which in A. virosa is more pronounced and firm. However, caution should still be taken, as misidentifications can occur.

3️⃣ Amanita bisporigera (Western Destroying Angel) 💀

Closely related to Amanita virosa, the Western Destroying Angel is another highly toxic species that has a similar white stem and smooth, pale cap. This mushroom also has a more noticeable volva and distinct ring. Its toxic properties are just as potent, so it should never be consumed.

4️⃣ Amanita citrina (False Death Cap) ⚠️

Though not as toxic as the Death Cap, Amanita citrina (known as the False Death Cap) is another mushroom that can be easily confused with A. manginiana. It features a pale, yellowish cap and a white stem but lacks the dark center and volval remnants seen in A. manginiana. Still, caution is necessary as it shares some structural similarities.

Photos source:

lxjfx (Tsukuba, Ibaragi, Japan)