Grisette
(Amanita vaginata)
Conservation • Description • Habitat • Ecology • Distribution • Taxonomy
Conservation Status |
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| IUCN Red List | not listed |
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| NatureServe | NNR - Unranked |
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| Minnesota | not listed |
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Description |
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Grisette is a common, medium-sized, gilled mushroom. It occurs in Europe, Japan, eastern Australia, North America, Mexico, and Central America. In the United States and southern Canada, it occurs east of the Great Plains and in the Pacific Northwest. It is relatively common in eastern Minnesota. It is found in the summer and fall, alone, scattered, or close together but not clustered (gregarious), in deciduous and mixed woodlands. It grows on the ground near trees. It has a mutually beneficial relationship (mycorrhizal) with the tiny rootlets of hardwood and coniferous trees, absorbing sugars and amino acids while helping the tree absorb water. The cap is oval, gray to grayish-brown, and sticky at first. As it ages it spreads out, becoming broadly convex. The mature cap is 1¼″ to 4″ (3 to 10 mm) in diameter and flat, often with a raised bump in the middle (umbonate). It is usually darker, often very dark, in the middle. The margins are prominently lined or grooved (striate), the grooves extending inward ⅜″ (1 cm) or more. The surface is dry but becomes slightly slimy when wet. There are sometimes a few scattered white to grayish patches, remnants of the universal veil, clinging to the cap. The stalk is 2¾″ to 6″ (7 to 15 cm) long, 3⁄16″ to ¾″ (5 to 20 mm) thick, and slightly tapered to the top. It is slender, fragile, white, and often covered with grayish or grayish-brown scales. There is no ring. The base is loosely enclosed in a cup-like sac (volva) that is the persistent remains of the universal veil. The volva is white and often develops grayish or rust-colored blemishes. The gills are closely spaced to nearly crowded and are narrowly attached to the stalk (adnate) or not attached (free). They are white or tinged with gray. There are secondary, short gills between the main gills. These are plentiful but unevenly distributed. The flesh is thin, white, and soft. It does not discolor when sliced. Unlike most Amanitas, it is edible. However, eating it is strongly discouraged due to its similarity to highly poisonous species. The spore print is white. |
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Similar Species |
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Tawny Grisette (Amanita vaginata) cap is orangish-brown to tawny or tan. There are no short gills. |
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Habitat and Hosts |
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Woodlands. Hardwood and coniferous trees. |
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Ecology |
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Season |
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Summer and fall |
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Distribution |
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Sources |
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| 8/3/2023 | ||||
Occurrence |
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Taxonomy |
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| Kingdom | Fungi (fungi) | ||
| Subkingdom | Dikarya | ||
| Phylum | Basidiomycota (club fungi) | ||
| Subphylum | Agaricomycotina (jelly fungi, yeasts, and mushrooms) | ||
| Class | Agaricomycetes (mushrooms, bracket fungi, puffballs, and allies) | ||
| Subclass | Agaricomycetidae | ||
| Order | Agaricales (common gilled mushrooms and allies) | ||
| Suborder | Pluteineae | ||
| Family | Amanitaceae (Amanita mushrooms and allies) | ||
| Tribe | Amaniteae | ||
| Genus | Amanita (Amanita mushrooms) | ||
| Subgenus | Amanita | ||
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Vaginatae | ||
Synonyms |
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Agaricus vaginatus Amanita strangulata Amanitopsis vaginata |
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Common Names |
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Grisette Grisette Amanita |
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Glossary
Mycorrhizal
A symbiotic, usually beneficial relationship between a fungus and the tiny rootlets of a plant, usually a tree.
Striate
Striped or grooved in parallel lines (striae).
Umbonate
On mushrooms, having a distinct, raised, knob-like projection in the center of the cap.
Universal veil
An egg-like structure that envelopes all or most of a developing gill mushroom. Remnants of the universal veil sometimes visible on a mature mushroom are patchy warts on the cap, a ring on the stalk, and a volva at the base of the stalk.
Volva
Also called cup. A cup-like covering at the base of a mushroom stem, sometimes buried. In Amanita, Volvariella, and some other mushrooms, it is the remnants of the universal veil ruptured by the mushroom pushing through. In Phallales it is the remnants of the ruptured peridium.
Visitor Photos |
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Paul |
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sprouted from the ground in a heavy wooded area. Dominantly burr oak and red oak. The specific area was a large pile of fallen trees, branches and brush that had been piled in the woods for years but was cleared earlier this summer to make way for a food plot which has been growing for better than a month. All of them are growing individually. First sighting was yesterday 8/1. As of today 8/2 all of the domes have flattened and it appears that the deer have eaten several as well. In all there was between 8-12 that I could find. Today I also found a few more that are just starting to pop out of the ground. |
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… I was only able to find a small handful of them today. It appears that most have been eaten by animals as I found several that were bitten off half way down the stem and the top of the stem with cap laying beside it. In any event, I did find a good example and I removed it from the ground by accident while lightly trying to brush away the soil around the base. … |
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This is a sample of what I am finding today. Some is new growth and some have clearly been chomped on. … |
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Margot Avey |
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They are beautiful in their own way! |
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MinnesotaSeasons.com Photos |
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Slideshows |
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Visitor Videos |
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Share your video of this fungus. |
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Other Videos |
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| What's That Fungus? - Amanita vaginata KY Forest Health |
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About
Oct 23, 2020 |
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| How to identify Amanita Vaginata (Grisette) mushroom? Alper Derya |
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About
Jun 7, 2020 Amanita vaginata, commonly known as the Grisette, is an edible mushroom in the fungus family Amanitaceae. The genus Amanita contains many deadly species. Amanita Vaginta has also some similiarites to these deadly species. I wanted to talk about a few imporant points to identify Amaniga vaginata. Have fun. Attention! - Please do not consume the mushrooms you have collected or purchased according to the comments and images here, get the opinion from a qualified person or search from reliable sources to be 100% sure. |
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| Amanita vaginata herbs & mushrooms |
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About
Sep 26, 2016 The details of this mushroom |
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Visitor Sightings |
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Report a sighting of this fungus. |
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| This button not working for you? Simply email us at info@MinnesotaSeasons.com. Be sure to include a location. |
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| Paul 8/3/2023 |
Location: St. Cloud, MN (Benton County) … I was only able to find a small handful of them today. It appears that most have been eaten by animals as I found several that were bitten off half way down the stem and the top of the stem with cap laying beside it. In any event, I did find a good example and I removed it from the ground by accident while lightly trying to brush away the soil around the base. … |
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| Paul 8/2/2023 |
Location: St. Cloud, MN (Benton County) sprouted from the ground in a heavy wooded area. Dominantly burr oak and red oak. The specific area was a large pile of fallen trees, branches and brush that had been piled in the woods for years but was cleared earlier this summer to make way for a food plot which has been growing for better than a month. All of them are growing individually. First sighting was yesterday 8/1. As of today 8/2 all of the domes have flattened and it appears that the deer have eaten several as well. In all there was between 8-12 that I could find. Today I also found a few more that are just starting to pop out of the ground. |
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| Margot Avey 8/24/2022 |
Location: Westwood Nature Center, St Louis Park MN They are beautiful in their own way! |
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| Margot Avey 8/20/2022 |
Location: Westwood Nature Center, St Louis Park MN |
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MinnesotaSeasons.com Sightings |
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Created: 8/31/2022
Last Updated: