Friday 6 August 2010

#42 Leratiomyces ceres

This common, orange, gilled mushroom has undergone several name changes. Until recently Leratiomyces ceres was known as Stropharia aurantiaca, and previously Hypholoma aurantiaca.

Fruit bodies are found gregariously, solitary or in clusters on wood chips in parks and gardens. Besides Australia, it occurs in North America, Europe, New Zealand and more. It's origin is unknown as it is likely to be transported around the world on wood chips. It apparently rarely occurs in natural woodland, but I think I found a single fruit body on a grassy clearing in Barrington Tops National Park.

Different stages of Leratiomyces ceres.

The cap is initially convex, becoming broadly convex, broadly bell-shaped or flat. When flat, a low umbo is usually present. Colour varies from reddish brown to shades of orange and can be sticky when fresh, or slippery when wet with rain, but quickly dries. Remnants of a white partial veil are usually found on the rim of the cap.

Gills are of various lengths, and are pale buff-grey when young, often tinged with dirty yellow, maturing to purplish grey flecked with rusty orange. Spore print is purplish black.

Stem is hollow, 3 to 10cms tall, dry, with hairy scales. Initially white, the stem matures with orange or brown colouration. Whitish to yellowish mycelial threads often appear at the base.

Leratiomyces ceres is reported to be poisonous.

Young Leratiomyces ceres with woolly stems

A bell-shaped cap

Mature stems are sometimes twisted.
Notice pale gills of young specimen.

Gills darken with purplish black spores with maturity.
Notice the white partial veil remnants on rim
and purple-black staining on stem from spores.
(surrounded by tiny Birds Nest Fungi)

Hollow stalk can turn orange with age.

Stem can have a shank buried by wood chips.

Cap ages to brownish orange, gills to dull brown.

My sightings of Leratiomyces ceres

[This will be updated with more sightings]

Hunter Region Botanic Garden, Heatherbrae, NSW - gregarious and clusters in wood chip mulched gardens May 2005, Jul 2010, Aug 2010, Jun 2012.

Barrington Tops National Park, NSW - single fruit body in grassy clearing, Jul 10.

Newcastle University, NSW - wood chip mulched gardens Jun 2012.

A Leratiomyces ceres fruit body infected by a species of the parasitic fungus Spinellus from Family Zygomycete. Sporangiophores are the hair-like reproductive stalks, topped with sporangi (the tiny black dot-like spore-containing receptacles.)

1 comment:

Phronima said...

I found plenty on mulched areas of Sydney Park, St Peters last few weeks. I noticed older speciments have caps that are cracked.