White float (Amanita nivalis)
- Department: Basidiomycota (Basidiomycetes)
- Subdivision: Agaricomycotina (Agaricomycetes)
- Class: Agaricomycetes (Agaricomycetes)
- Subclass: Agaricomycetidae (Agaricomycetes)
- Order: Agaricales (Agaric or Lamellar)
- Family: Amanitaceae (Amanitaceae)
- Genus: Amanita (Amanita)
- Species: Amanita nivalis (Snow-white float)
- Amanitopsis nivalis;
- Amanita vaginata var. Nivalis.
The snow-white float (Amanita nivalis) belongs to the category of mushrooms from the Amanitov family, the genus Fly agaric.
Mushroom Snow-white float (Amanita nivalis) is a fruiting body, consisting of a cap and a leg. The cap of this mushroom reaches 3-7 cm in diameter, in young and immature mushrooms it is characterized by a bell-shaped shape, gradually becoming convex-outstretched or simply convex. In the middle of the cap, a bulge is clearly visible – a tubercle. In its central part, the cap of the snow-white float is rather fleshy, but at the edges it is uneven, ribbed. The skin of the cap is mostly white, but has a light ocher tint in the center.
The leg of the snow-white float is 7-10 cm long and 1-1.5 cm in diameter. Its shape is cylindrical, slightly expanding near the base. In immature mushrooms, the leg is quite dense, but as it matures, cavities and voids appear inside it. The leg of young snow-white floats is characterized by a white color, gradually darkens, becoming dirty gray.
The mushroom pulp has no pronounced aroma or taste. In case of mechanical damage, the pulp of the fruiting body of the fungus does not change its color, remaining white.
On the surface of the fruiting body of the snow-white float, the remains of the bedspread are visible, represented by a bag-shaped and fairly wide white volva. There is no ring characteristic of many types of mushrooms near the stem. On the cap of young mushrooms, you can often see whitish flakes, but they disappear without a trace in ripening mushrooms.
The hymenophore of the snow-white float (Amanita nivalis) is characterized by the lamellar type. Its elements – plates, are located often, freely, and significantly expand towards the edges of the cap. The plates are very narrow near the foot, but in general they can have different sizes.
The spore powder is white in color, and the microscopic pore sizes vary within 8-13 microns. They are round in shape, smooth to the touch, and contain fluorescent drops in the amount of 1 or 2 pieces. The skin of a mushroom cap consists of microcells, the width of which does not exceed 3 microns, and the length is 25 microns.
Season and habitat of the fungus
The snow-white float is found on soils in wooded areas, at the edges of forests. They are among the active mycorrhiza formers. This type of mushroom can be found on all continents except Antarctica. Most often this mushroom can be found in deciduous forests, but sometimes it grows in mixed forests. In the mountains, it can grow at altitudes of no more than 1200 m. You can rarely meet a snow-white float here, little-known and poorly studied by scientists. Active fruiting of this species lasts from July to October. Found in Ukraine, Russia, in some European countries (England, Switzerland, Germany, Sweden, France, Latvia, Belarus, Estonia). In addition, the snow-white float also grows in Asia, in the Altai Territory, China and Kazakhstan. In North America, the fungus of this species grows in Greenland.
The snow-white float is considered a conditionally edible mushroom, but little has been studied, so some mushroom pickers consider it poisonous or inedible. Distributed in many European countries, but very rare.
Similar types and differences from them
Other types of floats are similar to the snow-white float, and they all belong to the category of conditionally edible. However, the snow-white float (Amanita nivalis) can be easily distinguished from other fly agaric species by the absence of a ring near the leg.
Other information about the mushroom
The snow-white float belongs to the genus Amanitopsis Roze. The fruit bodies of this species can be both large and medium in size. In immature mushrooms, the surface of the stem and cap is enclosed in a common veil, which opens fully as the fruit bodies ripen. From it, at the base of the mushroom leg, a volva often remains, which is not only well expressed, but also has a fairly large volume, is characterized by a bag-like shape. In mature mushrooms of the snow-white float, the Volvo can disappear. But the private cover on such mushrooms is completely absent, which is why there is no ring around the leg.
It is quite easy to separate the cap of the snow-white float from the leg. There may be warts on her cuticle, which are very easy to separate from the thin upper cuticle.