I forgot to comment about photo 1. An excellent view of the spur on the back of the flower, typical of this species. The other typical characteristic, though difficult to photograph without a macro lens, is the hairs on the leaf stalk, which point backwards. I tend to disagree with Michael about this form of Viola odorata being slow to spread, though in the dry sandy soil of Black Mountain this could well be so. When we first moved into our house in 1972, we got some pots of it as free issue from Yarralumla Nursery. They had been labelled as a native plant. The seed cases open explosively and they quite quickly came up all over the garden. It took us about 40 years of effort to get rid of them. Our soil is clayey, and whenever we have young plants, moist.