Soliva sessilis

It appears with small feathery leaves reminiscent of parsley, with an exposed upward-pointing rosette of seeds in a pod nestled at the branch junctions.

It is mainly found in parks and ovals, though it has also become an invasive species in lawns in the southeast USA, Australia and New Zealand.

Bindi weed can be manually removed by pulling it out at the root, usually when it's grown big, and started to flower, and before seeding—especially after rain when the ground is softer.

Effective herbicides are typically combinations of MCPA and Dicamba, which target broad-leaved plants but not grasses.

Bindi weed also favours compacted ground, so aerating the soil should also reduce the presence of the plant.