Unidentified fruit object

Phil@Tyalgum starts with ...
I wonder if anyone might be able to identify fruit in the photos. A huge tree growing in the grounds of the local hospital, leaves similar in size and shape to a loquat, producing these baseball sized, hard shelled fruit. Smells somewhat like a durian, although doesn't appear edible.

Pictures - Click to enlarge
Picture: 1

JUJUBE FOR SALE IN MELBOURNE says...
Hi phil,

I think it is elephant apple.

If you go to this webpage to search for this fruit you could see more pictures:

http://www.toptropicals.com/cgi-bin/garden_catalog/cat.cgi

Here is another one:

http://www.tradewindsfruit.com/elephant_apple.htm

I have seen them grown in Cairns not many just one or two trees in Kuranda.

Speedy says...
Dillenia indica for sure.
There are a few around M'bah
There used to be a sign under that tree warning people not to sit under it cause the fruit might fall and hurt someone.

Edible... you'd want to be bloody hungry to eat it, I've tried, I'll have a go at most things, but there may be something I'm missing in prep...
Sometimes I feel that "edible" is just code for 'Not Toxic'.
Elephant Apple, for me, falls way short of the other categories of 'palatable', 'fair', 'good', 'choice' or'excellent'
:-P

Right near there there is a white flowering Jacaranda.
There is also a Bombax worth seeing when it's in flower (june-July? . a long time since i was there).
If you go from the Elephant apple, through the carpark there is a kind of service area away from public areas.
the Bombax tree is at the edge of the bitumen where it drops down fairly steeply.
Its a big spikey trunked tree.
nice big red flowers.

Speedy says...
Don't know about cuttings.
Best to graft to Jacaranda seedlings.
Thats how it's usually done.
;-)