Distributions of host-galaxy interstellar reddening E(B − V) for type Ia SNe originating from host galaxies of four representative morphological types: LT with B/T = 0 or B/T = 0.3, as well as S0 type and classical elliptical (for the model parameters, see Tables 1–2). The distributions are computed for edge-on (left panel), face-on (middle panel), and random (right panel) orientations (no difference for elliptical galaxies which are assumed to be spherically symmetric). The purple curve on the right panel shows the result of averaging type Ia SN rates over host-galaxy morphological types. All distributions peak at E(B − V)≈0. The apparent differences between the late- and ET host galaxies are primarily driven by different dust-to-stellar mass ratios measured from IR observations. The distributions shown in Figure 2 are strongly modified by averaging over the SN position in the host galaxy.