Logarithmic fluxes (left, in erg s^-1 cm^-2) and full width at half maximum (right, in km s^-1) of the Hα broad line emission obtained from the HST/STIS spectra compared to the results of the Palomar spectroscopic survey. The dashed line has a slope equal to one. The green symbols represent the LINERs of the sample, while the red squares are the Seyferts. NGC 1275, the ambiguous galaxy, is marked with a purple square. Empty symbols refer to the undetected BLR.