It is a strange plant, Reseda luteola (Färber-Reseda), with no spectacular flowers but still very stylish. This species has been imported millenia ago as it was used to produce yellow colour; it isn't used much for that anymore (or probably not at all), chemical colours prevail in our modern times. This one is rarer than its very common relative Reseda lutea, and even though the latter too is nice it is 'just' nice while Reseda luteola is beautiful.
Here's the habitat where I found this one, the hilly lands to both sides of the new motorway S1 on the border between Vienna and Lower Austria (the place where the plant grew lies in Lower Austria, but on the other side of the hill lies Vienna): they are artificial, earth which was dug out for tunnels was put up to a huge dam both to get rid of the surplus of earth but also to prevent noise pollution of the surroundings. S1 was opened for traffic in april 2006 so this habitat is still quite young; and despite the fact that thousands of cars and trucks go past this place each day it has developped into a lovely biotope already.
