Russula claroflava

2010-08-11 Russula claroflava Grove. ss. Melz, & Zv., J. Schff 98988

Russula claroflava, commonly known as the yellow swamp russula or yellow swamp brittlegill, is a species of mushroom belonging to the genus Russula. It is found in wet, mossy forests, particularly favoring damp areas near birch trees. This species is part of the large and diverse Russulaceae family, which is characterized by mushrooms with brittle flesh due to the presence of spherical cells called sphaerocysts.

Description

Russula claroflava features a cap that can range from 4 to 10 cm in diameter, initially convex before flattening out with age, often with a slight depression in the center. The cap's color is typically a vibrant yellow, though it can vary to a more greenish or ochre hue. The gills are adnate to slightly decurrent, crowded, and pale cream in color, turning more ochre as the mushroom ages. The stem is white to pale yellow, cylindrical, and measures 4 to 8 cm in height and 1 to 2.5 cm in diameter.

The flesh of the mushroom is white and maintains its color when cut or bruised. It has a mild taste and a faint smell, which can be described as fruity or nutty by some. Russula claroflava produces a white spore print, and its spores are broadly ellipsoid, ornamented with warts and ridges which are partially connected by fine lines, forming a partial network.

Habitat and Distribution

Russula claroflava is primarily found in Europe, particularly in northern and central regions, extending into parts of Asia. It forms mycorrhizal associations with birch trees, growing in wet, mossy areas within both deciduous and mixed woodlands. The presence of Russula claroflava is often an indicator of undisturbed, ecologically balanced environments.

Edibility

This mushroom is considered edible, though not highly esteemed. It is recommended that Russula claroflava be cooked before consumption, as all russulas can potentially cause gastrointestinal discomfort if eaten raw. The taste is mild and somewhat nutty, making it a decent, if not particularly sought-after, addition to dishes that require mushrooms.

Conservation

Currently, there are no major conservation concerns for Russula claroflava, as it tends to be quite common in suitable habitats. However, like many fungi, it could be susceptible to changes in its environment, such as deforestation, pollution, and climate change, which could impact its mycorrhizal host trees and, consequently, its own populations.

See Also

• Mycorrhiza
• Russula
• Edible mushrooms