You are looking at a plant which is widely cultivated because it is pretty, very easy to grow, and is now available in a range of flower-colour options.
Oxalis purpurea is one of many “alien invaders” from Southern Africa.
They displace native species.
Alas, they (and other weed species from southern Africa) now proliferate even in places dedicated to the conservation and showcasing of Australian native flora.
I took the photo in Perth’s Kings Park on 20 September 2025.
The pictured individual was one of countless thousands in bloom there.
They, and freesias, watsonias and veldt grass – all, fellow invasive pests from Southern Africa – are now among Kings Park’s more ubiquitous/most easily-seen species.
Western Australia is one of at least four Australian states that have declared Oxalis purpurea an environmental weed.
The more “correct” of its many common names: “purple wood sorrel” and “large flowered wood sorrel”.
Discover more here.