The word "gruzd" in translation from Church Slavonic means "heap".
No wonder they got that name.
In ancient times in Russia, mushroom pickers collected their carts and salted in barrels.
All sorts of muzzle combine common features: concentric rings on the cap are seen and the shape changes with the growth of the fungus — first it is convex and then funnel-shaped with the edges bent down.
They belong to the fungi. The plates can be of different colors, depending on the type, and go to the leg. All species of moor bean are combined into the genus Mlechnik (lat. Lactarius) of the Syrushage family (lat. Russulaceae).
- Lunch real (Lactarius resimus)
- Squish yellow (Lactarius scrobiculatus)
- Peppermint (Lactarius piperatus)
- Aspen Chest (Lactarius controversus)
- Cheese parchment (Lactarius pergamenus)
- Bluish (Lactarius glaucescens)
- Black Lactarius necator
- Bluedens (Lactarius repraesentaneus)
- Oak (Lactarius insulsus)
- Milk squeaks or creaks (Lactarius vellereus)
Lunch real (Lactarius resimus)
In 1942, microbiologist Boris Vasilkov studied species of salmon, made a description of them, and called the white salmon a real mushroom, because it is considered by the people. Although up to this time the pepper pepper was called a real one. 
It grows in the Volga region, in the Urals, in Siberia. Hat in diameter 6-25 cm, white or yellowish, slightly sticky. Its shape is changing, and under it are white plates. The edges of the cap can be covered with a fluff, which is the main distinguishing feature of this species.
Leg 3–9 cm high, cylindrical, white or yellowish, empty in the middle. The body of the fungus is white, with a milky juice at the break, which changes its color to yellow-gray when interacting with air. The smell is very similar to the fruit flavor. Crop harvested from July to late September in deciduous and mixed forests near the birch trees.
In Russia, white mushrooms are considered to be the king of mushrooms and are eaten, in Western Europe they are inedible. Since the milky juice has a bitter taste, it is soaked before cooking, long boiled, after which it acquires a blue tint.
In folk medicine, real milk is used in the treatment of urolithiasis and renal failure.
Squish yellow (Lactarius scrobiculatus)
Refers to conditionally edible species. Grows in coniferous or birch forests of Eurasia with a temperate climate. 
The hat is 6-28 cm in diameter, golden yellow, smooth. The shape of the cap changes as the mushrooms grow. Plates with brown spots can be placed on its bottom side. The leg grows in height up to 12 cm, with bright yellow grooves, strong, sticky, although inside it is empty. The pulp of the fungus is white, but turns yellow on a break. The milky juice is also characteristic. The smell is weak but pleasant. Prefers to grow on limestone soils.
It is eaten after soaking and boiling. For treatment in folk medicine is used in the form of decoction from gallstone disease.
Peppermint (Lactarius piperatus)
Treats often found mushrooms in a moderate and forest-steppe zone of Russia. 
The pepper pepper retains all the general characteristics of the load, but has such features. The cap is 6-18 cm in diameter, creamy-white, sometimes covered with reddish spots. The center has a velvety surface, but does not have concentric rings. The flesh is white, dense, on a fracture it releases the milky sap, which, when interacting with the air, becomes olive-green, and the flesh becomes bluish-blue.
The pepper mushroom tastes spicy, and its smell is similar to rye bread.Leg up to 8 cm, white, dense with a slightly wrinkled surface. When growing up it acquires a greenish or reddish tint. Under the cap, the plates are narrow, descending along the leg of a white, creamy color. If the plates are damaged, they become covered with yellow-brown spots.
Pepper grows in deciduous or mixed forests from July to October and forms mycosis with oak, birch and spruce. Mushrooms are used for salting, pickling, or in a pounded dried form instead of pepper.
This species is used in folk medicine for the treatment of kidney disease, gallstone disease, tuberculosis, moreover, conjunctivitis. Milky juice remove warts.
Aspen Chest (Lactarius controversus)
This species is also called the boarder poplar or aspen. Grows in warm zones of temperate climatic zone. In Russia, they are massively found in the Lower Volga region. 
Refers to conditionally edible due to the presence of milky juice. The description of the mushroom is similar to the present one, but it is distinguished by the presence on the cap of pale pinkish spots and pink plates under it. Milky juice is white abundant and acrid, it does not change color on a break.
Received its name from the habitat - aspen and poplar forests. This species is larger than the others, its cap can grow up to 30 cm in diameter. It is valued lower than milkworms are white and yellow, but is famous for its massive germination.
Ripening aspen occurs under the ground, so there is always a lot of dirt on the bonnet. Forms mycorrhiza with willow, aspen, poplar. Harvesting takes place from late August to early October. Pulp gruzdya aspen white, fragile, dense with a characteristic fruity odor. Use this view only for pickling.
Cheese parchment (Lactarius pergamenus)
This species refers to conditionally edible mushrooms. It grows in mixed forests in large groups. 
The parchment cap is up to 10 cm in diameter, has a white color, which changes to yellowish with the growth of the fungus, the surface is wrinkled, it can be smooth. Saves all the features of the form of loading. The pulp of the fungus is white with a milky sap that does not change color when broken. Under the head plate yellowish color. Leg narrowed to the bottom, long, white.
It has a similarity with the transverse load, but on a higher stem and slightly wrinkled cap.Harvesting is carried out in August-September. Used for salting with pre-soaking.
Bluish (Lactarius glaucescens)
To the group of white grujdai carry a bluish grudge, as well as a parchment. This species grows in the deciduous forests of Eurasia. A feature of the species is the presence of yellow-gray spots on the surface of the cap. All other descriptions are the same. 
Milky sap gruzdya bluish quickly curtailed and turns a little green. This makes it look like peppers. The distinction between these species for mushroom pickers does not really matter. All these species, though similar, but also include to conditionally edible mushrooms. And these species in nature do not have poisonous twins.
Forms mycosis only with deciduous trees. Crop harvested from July to September. In cooking, used only for pickling.
Black Lactarius necator
Black mushroom belongs to conditionally edible. The description of the outward signs is like all milk mushrooms 
Hat in diameter can be up to 20 cm dark olive or dark brown in color with darkening in the center. The flesh is dense, white, fragile, changes its color to gray when broken. Milky juice is caustic, plentiful. The leg is the same color with a cap.
The fungus forms mycorrhiza with birch and grows in mixed forests. Harvesting from July to October. It is used for salting, acquiring a purple-burgundy color.
Bluedens (Lactarius repraesentaneus)
This species has also received the name of the muzzle dog or golden yellow violet. Distributed in the temperate and arctic zone of Russia in deciduous and mixed forests. 
The cap is 7–20 cm in diameter, thick, yellow in color with weak concentric rings, shaggy at the edges. The flesh is white, dense, the milky juice on the air acquires a purple color, but is not abundant. The plates are narrow, pale yellow in color and form dark spots when damaged. Leg pale yellow color up to 10 cm in height, hollow inside, turning blue on the break.
Forms mycosis with birch, willow and spruce. Harvesting takes place in July and October. An important feature of this species is that scientists have derived from it special substances that can increase plant growth.
The closest in terms of similarity is yellow salmon, which is distinguished by bright yellow milky juice. With the purpose of treatment are used antibacterial abilities blueing. In cooking, suitable for salting, pickling, frying after pre-boiling.
Oak (Lactarius insulsus)
Bulk oak belongs to the less common species and is also called the oak flax. It combines all the signs of loading and has a red or yellowish-orange color. 
The plates under the cap are wide and frequent. The foot is off-white or pink. The pulp of the fungus is dense, cream-colored. The milky juice is white, not plentiful, but acrid, with a cut does not change color.
Like the aspen bark, this species matures underground, therefore it is characterized by the presence of dirt on the cap. Belongs to conditionally edible mushrooms.
In cooking, it is used for pickling. It grows in forests of broad-leaved species and forms mycosis with oak, hornbeam, beech. Harvesting takes place from July to early October.
Milk squeaks or creaks (Lactarius vellereus)
The name grudge creak got because of the contact with foreign objects, it publishes a characteristic creak.Often it is also called spurge. This type of gruzdey refers to conditionally edible and is considered the driest weight. Distributed in Russia, Belarus. It looks like a white bear, but has its own characteristics. 
Cap diameter up to 24 cm, may acquire a yellowish tint. Leg up to 7 cm in height and up to 5 cm in diameter. A characteristic feature of this species is a change in the shade of the milky juice after drying from white to reddish. White flesh at fracture becomes greenish-yellow. The plates under the cap are much less common than those of pepper melting.
Forms mycorrhiza with aspen and birch. Grows in deciduous and mixed forests in large groups. Harvesting is carried out from August to October. In cooking, it is used for salting, however, this type of salmon becomes blue when it is salted. In taste, the squeak is inferior to the white.
