Volvopluteus gloiocephalus

Volvopluteus gloiocephalus', commonly known as the big sheath mushroom, rose-gilled grisette, or the globose-headed volvopluteus, is a species of mushroom belonging to the family Pluteaceae. This mushroom is notable for its distinctive pink gills, which turn brown as the spores mature, and its large, white, sack-like volva that encases the base of the stalk. It is found in various parts of the world, growing solitarily or in groups in woodlands and on disturbed grounds, often on wood chips or in gardens.

Description

Volvopluteus gloiocephalus features a cap that can range from 5 to 15 cm in diameter, initially globose before expanding and flattening with age. The cap surface is smooth and white, sometimes with a slight pinkish or yellowish hue in wet conditions. The gills are free, crowded, and pink, becoming brownish with spore maturity. The stalk measures 6 to 12 cm in height and 1 to 2 cm in thickness, often bulging towards the base. A distinctive feature of this species is the large, white volva at the base of the stalk, which remains as a remnant of the mushroom's immature stage.

The spore print of Volvopluteus gloiocephalus is salmon or pink, a characteristic trait of mushrooms in the family Pluteaceae. Spores are smooth, ellipsoid, and measure approximately 7-10 by 4-6 micrometers.

Habitat and Distribution

Volvopluteus gloiocephalus is a cosmopolitan species, found in North America, Europe, Asia, and Australia. It typically grows in rich, disturbed soils, often associated with wood chips, mulch, or in garden settings. This mushroom is saprobic, feeding on dead organic matter, and is most commonly observed from late spring through to autumn.

Edibility

The edibility of Volvopluteus gloiocephalus is a subject of debate, with some sources suggesting that it is edible, while others advise against consumption due to the potential for confusion with toxic species. If considering for consumption, proper identification by an expert is strongly recommended.

Similar Species

Volvopluteus gloiocephalus can be confused with several other species, including those in the genus Amanita, some of which are highly toxic. Key distinguishing features include the pink to brown gills, the presence of a volva, and the habitat (often in disturbed, nutrient-rich soils rather than in undisturbed woodland).

Conservation

As a widespread and adaptable species, Volvopluteus gloiocephalus does not currently face any significant conservation threats. However, habitat destruction and pollution can impact local populations.

See Also

• Mushroom hunting
• Mushroom poisoning
• Pluteaceae

References

Volvopluteus gloiocephalus
Mycological characteristics
	gills on hymenium
	cap is convex
	hymenium is free
	stipe has a volva
	spore print is pink
	ecology is saprotrophic
	edibility: edible