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Inedible Mushrooms

Here is a list of inedible mushrooms. The mushrooms are not necessary poisonous, but useless as food.

Take in consideration that mushrooms can look different depending on the location and climate. The photos on this page may not be representable for species in your area.

Click on the pictures to enlarge them.

Rhizina undulata   (Pine firefungus)
Family
Rhizina undulata
Location
North America, Europe
Dimensions
2-10 cm diameter
Edibility
Inedible

Description
Rhizina undulata, also know as Pine firefungus, is a large, irregular, brown or black fungus that grows in clusters on burned soil or conifer debris.

Fruiting bodyflat, with irregular lobes, and attached to the growing surface on the entire lower side by numerous whitish to yellowish rhizoids resembling plants roots. The margin is pale yellow (like the underside), and wavy and irregular. Surface sticky as moist. Flesh is reddish brown, tough and thick.

Occurrence It is grows infrequently from early summer to early autumn.

Rhizina undulata on Wikipedia.
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Rickenella swartzii
Family
Tricholomataceae
Location
Europe
Dimensions
Cap 0.5-1 cm diameter, stem 2-4 cm tall * 0.1-0.2 cm thick
Edibility
Inedible

Description
Rickenella swartzii is a tiny agaric that is pale grey to grey-brown. The cap center (navel) is almost black while it is cream-coloured at the margin. The top of the stem is tinged dark violet. It grows in scattered trooping groups in lawns and other grasslands, typically with moss.

Cap convex, expanding to nearly plane, sometimes centrally depressed; margin decurved. Flesh cream, very thin. Gills pallid, deeply decurrent, fairly well-spaced, at first whitish, then cream-colored. Spores whitish colored. Stem round, equal except enlarged at the apex; surface like the cap.
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Russula acrifolia
Family
Russulaceae
Location
North America, Europe
Dimensions
Cap 5-20 cm diameter, stemp 2-8 cm tall * 1-4 cm thick
Edibility
Inedible

Description
This large species has a grey to dark-brown hat with a depressed center, and sturdy stem. The hat becomes red when it is injured but then turns blackish-grey. The crumbly but firm flesh is off-white when cut, slowly turning red and then black. Its gills have a very sharp taste. The inedible Russula grows under various deciduous and coniferous trees.
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Strobilomyces strobilaceus   (Old man of the woods)
Family
Boletaceae
Location
Europe, North America and Asia
Dimensions
Cap 4-10 cm diameter, stem 8-12 cm tall * 2 cm thick
Edibility
Inedible

Description
Strobilomyces strobilaceus, commonly known as Old man of the woods, is a medium to large bolete which is characterized by very soft dark grey to black pyramidal and overlapping scales on the cap surface.

Cap at first convex-shaped and flatten out with age. It is covered with upright blackish scales that are woolly when the caps are young, becoming firmer on ageing specimens. Pores on the underside of the cap are hexagonal, coloured dirty white or grey. The flesh is thick and initially white but will stain pink and then slate grey and black after exposure to the air. Stem coloured like the cap and has a woolly surface and a thick, ascending ring-like structure at the top. Spores are black.

Synonymes The name Strobilomyces floccopus is commony used for the mushroom in North America.

Strobilomyces strobilaceus on the First Nature Web site.
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Strobilurus esculentus   (Spruce Cone Cap)
Family
Marasmiaceae
Location
Europe
Dimensions
Cap 1-2 cm diameter, stem 2-7 cm tall * 0.1-0.2 cm thick
Edibility
Inedible

Description
Strobilurus esculentus, also know as Spruce Cone Cap is a small agaric with a brown, conical cap and whitish gills. The mushroom grows solitary or in small groups, attached to buried or partly buried spruce cones. Note: this species never occurs on pine cones.

Cap brownish grey, convex, becoming flattened, smooth. Flesh white and thin. It can also be off-white or brownish-black. Gills crowded, white, and somewhat sinuate. The spores are white. Stem brownish grey with a pale apex.

Similar species Strobilurus stephanocystis and Strobilurus tenacellus favor pine cones.
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Strobilurus stephanocystis   (Pine Cone Cap)
Family
Marasmiaceae
Location
Europe
Dimensions
Cap 1-2 cm diameter, stem 2-7 cm tall * 0.1-0.2 cm thick
Edibility
Inedible

Description
Strobilurus stephanocystis, also know as Pine Cone Cap is a small agaric with tawny-brown cap and whitish gills that grows solitary or in small groups, attached to buried or partly buried pine cones.

Cap brown or tawny; at first convex, becoming flattened, smooth. Flesh white and thin. Gills whitish cream, adnexed and crowded. Stem pallid and coloured as cap, finely silky-pruinose, tapering slightly upwards, typically deeply rooting. The mushroom has no ring. Flesh white, fragile and hollow.

Similar species Strobilurus esculentus favor spruce cones.
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Tapinella atrotomentosa   (Velvet Rollrim)
Family
Tapinellaceae
Location
North America, Europe, Central America and Asia
Dimensions
Cap 12-28 cm diameter, stem 3-9 cm tall * 2-5 cm thick
Edibility
Inedible

Description
Tapinella atrotomentosa, also known as Paxillus atrotomentosus or Velvet Rollrim is a large or massive agaric that has a brown cap, buff gills and a dark brown, velvety, sometimes eccentric stem. The mushroom grows single or in groups or clumps on decaying conifer logs, stumps, roots, or partially buried wood.

Cap sepia- or walnut brown in colour with a inrolled cap margin and depressed centre. The cap is covered with dark brown or black velvety fur. Gills cream-yellow and forked, becoming ochre and spotted rust with age. Spores are sienna-brown. Stem thick, dark brown and juts out sidewards from the mushroom. The mushroom has no ring.

Synonymes Paxillus atrotomentosus is a older name.

Tapinella atrotomentosa on the First Nature Web site.
Tapinella atrotomentosa on the MushroomExpert.Com Web site.
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Tricholoma focale   (Booted Knight)
Family
Tricholomataceae
Location
North America, Europe
Dimensions
Cap 5-10 cm diameter, stem 6-8 cm tall * 1-1.5 cm thick
Edibility
Inedible

Description
Tricholoma focale, also known as Booted Knight, is a medium-sized, fleshy agaric with orange-brown to reddish-brown with cream gills and a distinctively banded stem. The mushroom grows scattered or in small trooping groups on soil with pines in coastal locations.

Cap Orange-brown to reddish-brown, cracking as it ages; convex, developing a flat top, margin inrolled. Gills white, browning on gill edges with age; adnexed to free; moderately distant. Stem white and smooth above shaggy ring, patterned with bands of large brown scales below; tapering continuously towards the base.

Tricholoma focale on the first-nature.com Web site.
Tricholoma focale on the MushroomExpert.Com Web site.
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WARNING

If you plan to collect fungi to be eaten, misidentified mushrooms can make you sick or kill you. Never eat a mushroom that you are not 100% sure is edible. Use many resources, and be skeptical of your own conclusions. Please consider that many mushrooms take years of experience to identify reliably.

The site takes no responsibility for damage caused by ingesting poisonous mushrooms. If you continue, you agree to view this website under these terms.