2010.01.01 Vienna X. district/ Lower Austria, district Schwechat (Johannesberg - brownlands, 220 m). For remarks about the habitat see here.
Flowering from june till september; in this case obviously a plant grew in fall due to unseasonally warm weather, and it survived till mid-winter. When I looked after it in march 2010 the plant was gone, either eaten by animals or picked by humans. See also the other photo
. ID: Fischer & al., Exkursionsflora 2008 (3rd);
I cannot be a 100% sure about species but it should be A. collina (which varies a great deal in habitus)