^..r2pi..i'd say it's a form of longifolia var. sophorae, though the spikes are a little long..hmm..finished flowers plus pod needed..interesting..
..hey,
bricklaya..some of these trees look very promising..
i've been very busy lately, and full ID requires a lot of comparision/cross-checking and detail..
but for now, the last pic could be
A. nerifolia (does it have a prominent central nerve on the phyllode?)
2nd last may be a form of
A. saligna, but need pods and more time..
3rd last probably a form of
A. melanoxylon, as you suggested..before that could be the fairly rare A. orites, which has small amounts unknown alkaloid, probably a ß-carb (own observations), but it's only found at 4-5 quite disjunct locations (may be as rare as A. phlebophylla)
..the last pics in the earlier post i have no idea right now, but the first couple look like
A. complanata (N-methyl-tetrahydroharman main alkaloid 0.3% leaf in 1 formal test)
..be great to hear of some tests on some of these..