Tricholoma robustum

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Tricholoma robustum is a species of mushroom belonging to the genus Tricholoma. It is part of the fungal family Tricholomataceae, which encompasses a wide variety of mushrooms. Tricholoma robustum, like other members of its genus, forms a symbiotic relationship with certain types of trees in a mycorrhizal association, playing a crucial role in forest ecosystems by facilitating nutrient exchange between the soil and their plant hosts.

Description

Tricholoma robustum is characterized by its robust and sizeable fruiting body. The cap is typically broad and can vary in color from a light grey to a more earthy brown, often with a slightly darker center. The cap surface is smooth to slightly fibrillose and can become somewhat sticky when wet. The margin of the cap is initially curved inward but flattens with age.

The gills are white to light grey, crowded, and are adnate to emarginate, sometimes with a slight notch near the stem. The stem is solid, white, and can be either cylindrical or slightly bulbous at the base. The presence of a ring (annulus) is variable and, if present, is usually very ephemeral.

The spore print of Tricholoma robustum is white, which is a characteristic feature of many Tricholoma species. The spores are ellipsoid and smooth, with dimensions that contribute to its identification.

Habitat and Distribution

Tricholoma robustum is found in temperate forests, particularly those dominated by coniferous trees such as pines and firs, with which it forms mycorrhizal relationships. It is a terrestrial mushroom, growing directly from the soil rather than on wood. This species prefers acidic soil conditions and is often found in mossy areas.

The distribution of Tricholoma robustum includes various parts of North America and Europe, although its presence can be somewhat sporadic and localized within these regions. It fruits in the late summer to fall, depending on local climate conditions.

Edibility

The edibility of Tricholoma robustum is a subject of debate among mycologists and foragers. While some sources suggest that it may be edible, others caution against its consumption due to the potential for confusion with toxic species and the possibility of gastrointestinal upset. As with all wild mushrooms, it is recommended that Tricholoma robustum only be consumed if positively identified by an expert.

Conservation

There is currently no specific conservation status for Tricholoma robustum. However, like many fungal species, its existence is closely tied to the health of forest ecosystems. The preservation of its natural habitat, particularly old-growth forests and undisturbed woodland areas, is essential for the survival of this species.

See Also

• Mycorrhiza
• Tricholoma
• Fungi of North America
• Fungi of Europe

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