Low-growing, rhizomatous populations of Physalis in Australia were originally thought to be P. viscosa. That's a coastal South American species, so you can imagine it getting introduced with ship's ballast. As a member of Section Viscosae, it should be covered in a velvety-layer of short, dichotomously branched hairs and have fruit ripening from golden yellow to tangerine orange.

Here are some nice examples in their native South America:
Branched hairs, orange fruit: https://www.inaturalist.org/observations/114072317
Branched hairs: https://www.inaturalist.org/observations/106217982
Branched hairs, orange fruit: https://www.inaturalist.org/observations/84745350
Orange fruit: https://www.inaturalist.org/observations/114319659
Orange fruit, not very hairy: https://www.inaturalist.org/observations/40090919
Orange fruit, not very hairy: https://www.inaturalist.org/observations/39768541
Nice branched hairs: https://www.inaturalist.org/observations/65508666

Physalis viscosa has also been reported as an invasive in South Africa. Some good examples:
Branched hairs: https://www.inaturalist.org/observations/11325630
Branched hairs: https://www.inaturalist.org/observations/11110557
Branched hairs: https://www.inaturalist.org/observations/106738228
Branched hairs: https://www.inaturalist.org/observations/70448588
Rhizome & non-reflexed corollas: https://www.inaturalist.org/observations/16823416
Nice branched hairs: https://www.inaturalist.org/observations/9955171

Now to compare to plants in Australia:
Here's everything currently identified as P. viscosa from Australia: https://www.inaturalist.org/observations?place_id=6744&taxon_id=78571

A group of plants with non-reflexed corollas and what look like branched hairs:
https://www.inaturalist.org/observations/104696673