thank you for id Betty I just realized that photo 2 doesn't belong here; it is a different plant and I will remove and upload extra (see the many prickles on the rose stem of photo 2). the 3rd photo (which will become photo 2 after removal of current no 2) shows thorns at the bottom left-hand side.
What is now photo 2 is also https://canberra.naturemapr.org/Community/Sightings/Details/4223650. Rosa canina is not as thorny as R. rubiginosa but can still have thorns. On R. canina fruit the drying sepals tend to be turned back and are not as persistent as on R. rubiginosa. I don't know if that is in any key.
Waltraud. Sorry to muck you around. Mike is quite right. Even though neither Plantnet nir Vicflora mention prickles on the stems, the Queensland weed site mentions scattered prickles, so we are back to the key characters of bristles/prickles on the flower (fruit) and leaf stalks. I cannot find any leaf stalks in the photos, but there is quite a good fruit stalk in photo 3. https://keyserver.lucidcentral.org/weeds/data/media/Html/rosa_canina.htm
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