Gardenia plant?

My gardenia is at least 20 yrs old, and has just produced what looks like a pear shaped fruit! Can anyone tell me what it is? We live in Gympie which is sub-tropical. Photo is available if needed.
Gardenia plant?
Gardenia jasminoides don't produce fruit in the United States. Our gardenia-friendly places, mainly Florida, California and along the Gulf of Mexico, don't have the sharp fall in night temperatures needed for the flower to turn to fruit.



The species that does fruit here is Gardenia thunbergia, which, unlike Cape Jasmine, really is from South Africa. It was named in honor of Carl Thunberg, a student of Linnaeus. It was introduced in Kew Gardens in London in 1773, decades after G. jasminoides made a stir.



According to Alice Notten of the Kirstenbosch National Botanical Garden in Cape Town, South Africa, the root is used as a skin medicine in southern Africa and the wood for tools. The Zulu name, "umvalasangweni," means "back gate closer," and the plant is used to secure cattle corrals.



The Afrikaans name, "buffelsbal," refers to the shape of the egg-shaped fruit and means "buffalo testicles." These can hang on a tree for more than a year. The plant is spread when elephants and ruminants eat the fruit, then deposit the seeds in fertilizing pats. Being short of gardenia fruit-studded elephant droppings, Americans generally propagate the plants from cuttings. But University of Florida cooperative extension sheets describe creating G. thunbergia rootstock from seedlings.
Reply:It's a gardenia fruit. Extremely poisonous. Most public places with fruiting gardenias will destroy the plants upon it fruiting.
Reply:Gardenia thunbergia will produce a seed pod, see plate 14 on this gardenia page. I am from brisbane and have never seen a gardenia produce pods, perhaps it was the dry conditions which reduced petal blight and other fungi to allow this to happen.