Protostropharia semiglobata (Dung Roundhead)

The fruitbody is a mushroom with a cap atop a central stem. The cap may be up to 3 centimetres wide and is usually hemispherical, rarely opening out further. It is smooth, slimy and usually some shade of yellow (or a little ochraceous). The gills are initially pale but become dark brown as the spores mature. The stem (smooth and yellowish) may grow to 10 centimetres long but is slender, often no more than half a centimetre in diameter. A partial veil is present in the immature mushroom and this remains as a narrow ring of tissue, high on the stem. The stem is slimy below the ring and dry above.

When the mushroom is in its prime the sliminess is very pronounced and you see something resembling a layer of glue on the cap and the stem (below the ring). In dry conditions the sliminess may disappear, leaving the mushroom smooth and shiny. Rewetting may revive the sliminess.  

Spore print: dark purplish brown.

The mushrooms grow on herbivore dung in a variety of habitats.

For many years this species was known as Stropharia semiglobata.

Look-alikes

This species should be easy to recognise, given the dung substrate, the colour, the ring and the sliminess.  

Bolbitius titubans (https://canberra.naturemapr.org/species/1794) may grows on dung and may at first seem similar. It also has a yellow cap (at least initially), but the cap has radial striations and there is no ring on the stem (which may white or yellowish). The mushrooms are also not as robust and collapse fairly quickly (not so with Protostropharia semiglobata).