Omphalina s.l.

Mushrooms in the genus Omphalina s.l. grow on soil and are small, with caps often only a centimetre or so in diameter and stems often of a similar length. The caps have a central depression and are therefore often somewhat funnel-shaped, but the margins may curve down a bit. Many of the species are brightly coloured but there are also dull coloured and white species. The pair of letters s.l. is a standard abbreviation in botanical works for the Latin phrase sensu lato (meaning 'in the broad sense'). Omphalina, as understood decades ago, has been split into several genera that are not always easy to recognize visually. Note that the genus Omphalina still exists but more narrowly defined than before. The usage of s.l. will, at times, allow a level of identification finer than family but where it is not possible to have any confidence in assigning a genus to a photograph.

If the mushrooms are yellow, check out Lichenomphalia chromacea: http://canberranaturemap.org/Community/Species/5840.