Amanita bisporigera (Destroying angel)

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Amanita bisporigera

Destroying angel, death angel, eastern destroying angel amanita

Parents	Unknown	Genus is not in the current taxonomy
Genus	Amanita	From Greek amānītai, a fungus
Species	bisporigera	Means “two spores per basidia,” though they have four; some other species have two

About plant names...

My mom used to warn us kids about deadly toadstools when we were growing up, and this is the species that best deserves this moniker. It is common and widespread. All members of the Amanita genus are poisonous in varying degrees, but these are perhaps the most dangerous. They appear in mixed coniferous and deciduous forests in eastern North America.

Identification: These are usually found singly or in small groups. They are all white, turning a bit tan, straw yellow, or rose pink with age. They rarely have white “warts” on the cap, leftovers of the veil. Fruits are up to 6" (13 cm) high, with a stipe up to ⅝" (1.8 cm) in diameter, and a cap up to 4" (10 cm) in diameter. A thin delicate “skirt” encircles the upper stalk, one identifying feature. Another is that the gills under the cap do not attach to the stipe. The base of the mushroom is a bulblike sac called the volva. A faintly pleasant odor becomes sickeningly sweet/rotten in older specimens.

Spores: These typically measure 0.3-0.4 mils () × ~0.3 mils (~). They are globose, ellipsoid, or very rarely elongate.

Edibility: Skull & Crossbones Deadly. This, and many amanitas, contain amatoxins, which interfere with cellular functions. The first symptoms of poisoning occur 6 to 24 hours after ingestion. This is followed by a misleading period of apparent improvement. Next, the liver and kidneys begin to fail, leading to death after four days. A single mushroom is fatal. Two extremely similar species: A. virosa and A. verna, are equally deadly, but restricted to Europe. A. ocreata appears in western North America.

Online References:

Michael Kuo's MushroomExpert.com

8/27/2017 · Beaver Brook Conservation Area, Self-guided Nature Trail, Hollis, New Hampshire
≈ 3 × 4" (8.1 × 10 cm)

10/28/2007 · By Jacquelyn Boyt

8/16/2015 · Table Rock Hike, Appalacian Trail, Grafton Notch State Park
≈ 7 × 9" (17 × 22 cm)

Slugs eat the mushrooms without ill effects. · 9/11/2021 · Otter Brook Preserve, Harpswell, Maine
≈ 8 × 5" (20 × 13 cm)

Amanita bisporigera description by Thomas H. Kent, last updated 13 Oct 2021.

7/23/2023 · The Mountain Trails, The Mountain Preserve, Belgrade Lakes Village, Maine

8/28/2017 · Lowell-Dracut-Tyngsboro State Forest, Lowell, Massachusetts
≈ 6 × 10" (16 × 24 cm)

8/28/2017 · Lowell-Dracut-Tyngsboro State Forest, Lowell, Massachusetts
≈ 6 × 7" (14 × 17 cm)

7/30/2015 · Beaver Brook Conservation Area, Hollis, Massachusetts
≈ 6 × 5" (14 × 12 cm)

8/6/2021 · Tarbox Preserve, Topsham, Maine
≈ 7 × 8" (17 × 20 cm)

8/15/2021 · Bass Falls Preserve, Alna, Maine
≈ 6 × 5" (14 × 12 cm)

8/15/2021 · Bass Falls Preserve, Alna, Maine
≈ 3½ × 4" (9.3 × 10 cm)