Tramping around my 100 acres of virgin Oz bush this morning, came across this one. In 17 years here, I've never seen it. It looked to me like some sort of annual from a home garden, but considering it was in a remote granite area, more than a kilometre from any neighbour, not likely. I've searched my books and can't find it. About 12"/30cm tall. Perhaps Fabaceae? Was considering Indigofera, but leaves totally wrong.