Hygrophorus olivaceoalbus

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Hygrophorus olivaceoalbus is a species of fungus belonging to the family Hygrophoraceae. It is commonly known as the olive-brown woodwax due to its distinctive coloration. This mushroom is found in temperate forests across North America and Europe, where it forms mycorrhizal associations with various species of trees, particularly with oaks and conifers. The presence of H. olivaceoalbus is often an indicator of healthy, undisturbed woodland ecosystems.

Description

Hygrophorus olivaceoalbus features a cap that ranges from 5 to 15 cm in diameter, initially convex before flattening out with age, often with a slight depression in the center. The cap's surface is smooth and slimy, displaying an olive-brown color that can vary in intensity. The gills are thick, well-spaced, and decurrent, running down the stem; they are white to light cream in color. The stem is cylindrical, measuring 4 to 10 cm in height and 1 to 2 cm in width, with a color similar to the cap but paler.

The spore print of H. olivaceoalbus is white, and its spores are ellipsoid, smooth, and hyaline. This species is considered edible, though not highly regarded due to its slimy texture and mild flavor.

Habitat and Distribution

Hygrophorus olivaceoalbus is predominantly found in temperate forests, forming symbiotic mycorrhizal relationships with hardwoods, especially oaks, and with conifers. These mushrooms emerge from late summer to late autumn, growing solitarily or in small groups on the forest floor, often hidden among leaf litter.

The distribution of H. olivaceoalbus is broad, covering many parts of Europe and North America. However, due to habitat destruction and changes in forest management practices, its populations are believed to be in decline in some areas, making it a species of conservation interest in certain regions.

Conservation

While not globally listed as endangered, the specific habitat requirements of Hygrophorus olivaceoalbus mean that it is sensitive to environmental changes, including deforestation, pollution, and the impacts of climate change. Conservation efforts aimed at preserving old-growth forests and maintaining healthy woodland ecosystems are crucial for the survival of this species.

Culinary and Cultural Aspects

Although Hygrophorus olivaceoalbus is edible, it is not widely collected for consumption due to its slimy texture and relatively bland taste. In some cultures, however, it may be used in traditional dishes or as a part of local culinary practices.

See Also

• Mycorrhiza
• Fungi of North America
• Fungi of Europe