Rough Chervil - Chaerophyllum Temulum
Rough chervil is similar in appearance to cow parsley, but is less completive and rarely takes over. It is later flowering and easily identified by its stem which is distinctly rough to the touch and covered with purple splotches. The flowers, which are in bloom from late May to July, attract a wide range of insects particularly hoverflies and beetles.
Best sown in the autumn as it requires cold to germinate.