Uroleucon jaceae has no common English name. It is one of the bigger species. Even though it can often be found on nettles, it is most striking visiting thistles. The colony starts right under a flower or bud and then slowly grows downwards. We are not absolutely sure about the identity of this species, but we think Uroleucon jaceae is correct given the long tubes, the black colour and the size of this plant louse.