Marasmius semiustus

Marasmius semiustus is a species of fungus in the family Marasmiaceae. It is a small, saprotrophic mushroom that is commonly found in the tropical rainforests of South America, Central America, and the Caribbean. The species was first described scientifically by mycologist Miles Joseph Berkeley in 1859.

Taxonomy

The species was first described in 1859 by British mycologist Miles Joseph Berkeley. The specific epithet semiustus is derived from the Latin words semis, meaning "half", and ustus, meaning "burnt". This refers to the characteristic half-burnt appearance of the mushroom's cap.

Description

The cap of Marasmius semiustus is small, typically measuring 1–2 cm in diameter. It is convex in shape, with a slightly depressed center, and has a smooth, slightly shiny surface. The color is typically a dark brown or blackish-brown, often with a paler margin. The gills are white and fairly crowded, and the stem is slender and tough.

The spores of Marasmius semiustus are white, elliptical, and smooth. They are produced on the gills and are dispersed by the wind.

Habitat and distribution

Marasmius semiustus is a saprotrophic species, meaning it obtains its nutrients by decomposing organic matter. It is typically found growing on the fallen leaves and twigs of hardwood trees in tropical rainforests.

The species has a wide distribution in the tropics. It is commonly found in South America, Central America, and the Caribbean, but has also been reported from other tropical regions around the world.

Edibility

While not generally considered a choice edible mushroom, Marasmius semiustus is not known to be poisonous. However, due to its small size and tough texture, it is rarely collected for consumption.

See also

• List of Marasmius species
• Mycology