Photospheric lines of ϕ Leo (black). Top: Balmer lines together with some lines due to neutral atoms. The absorption at ~3815 Å is most likely a blend of Fe I lines (the referenced wavelength denotes the strongest Fe I line of the blend, i.e. the one with the highest oscillator strength). Bottom: Na II D 5890/96 Å and O I triplet at 7775 Å. For comparison, the spectra of α Aql (red) and κ Phe (green) are also plotted. The strength and width of the Balmer lines and the rest of the spectral features are similar in all three stars, indicating that they are ‘pure’ photospheric absorptions.