Panel (a): observed spectrum of SN2010gx around maximum light; the SED fit (in magenta) is a blackbody fit to the ugriz photometry in blue, green, orange, red, and brown, respectively; the template spectrum of SN2005ap at a similar epoch is plotted in cyan. Panel (b): the same as panel (a) but around +10 days past maximum. The SN chosen and plotted as a template is SN2011ke (in blue). Panel (c): same as panel (b), but at +20 days past maximum. Panel (d): same as panel (b), but at +30 days past maximum.