Hi Michael. These came up in a low patch which was underwater between feb and mar after lots of rain creating a shallow lake of about 3m x 7m. A wattle fell into it and there is already a fallen dead gum tree in that patch. It is dry now. Run off from all over the place probably fed into it, but there is no sign of pine trees that I have seen in the reserve. There some prunus and other foreign trees in the high ground about 10m away and the army fenceline which has a number of foreign and native tree forest over the fence.
after surfing the internet - maybe its granulatus - i don't think there was that ring on the stem. they were quite big - at least 10cm across and a bit rough looking (not uniform).