Authors: P. Heinzel (Czech Academy of Sciences, Czech Republic and Wroclaw University, Poland), J. Wollmann (Czech Academy of Sciences), P. Kabath (Czech Academy of Sciences)

Spectra or photometric light curves of stellar flares are normally analysed in terms of flare ribbons which are the sites of energetic particle bombardments. However, on the Sun we resolve well ribbons and their overlying flare loops. On cool stars the magnetic loops are expected to be much larger as compared to the solar case and thus we suggest that such extended loop arcades must significantly, if not dominantly, contribute to the spectroscopic or photometric signals and must certainly have a specific effect on the shape of line spectra (line asymmetries). We will present our recent analysis of the emission spectra of AD Leo where we have been able to explain the line asymmetry as a consequence of strong downflows along the cool loops, as typically observed on the Sun. We  discuss these new results in a broader context of stellar flare spectroscopy.