It is so dry in my house right now that I am surprised that these buds made it to maturity.  These flowers are highly variable in color from year to year.  Last time she bloomed, it was in my extremely hot and humid grow room, and the flowers were almost entirely white with hints of red.  This year the blooms are almost entirely red with hints of white.  That is why flower color is not a good criteria for identification.  Here is the bloom from yesterday: