Top left: Ca II H and K lines and the Balmer Hϵ of ϕ Leo (black), together with α Aql (red) and the shell star HR 7731 (blue). The conspicuous non-photospheric contribution in the Ca  II lines of ϕ Leo is distinguishable although not as prominent as in HR 7731. Top right: same three stars, but in this case the photospheric line Mg  II 4481 line is similar in all stars, while the shell Fe  II and Ti  II lines are striking in HR 7731 but less so in ϕ Leo. Bottom left: 5169 Å line of the Fe  II triplet 42. Bottom right: Ca  II triplet line at 8542 Å. The spectrum of α Aql is plotted superimposed on the ϕ Leo spectrum in all panels.