There are so many wonderful varieties of flowers that you're sure to find something suitable for your room, whatever style it may be. Take a look at the chart below for some tips (originally this was a chart meant to help with floral arrangements in wedding planning, but I think it's pretty informative in general!):
My favorites are peonies and hydrangeas. What are yours?
Roses:
Lilacs:
Calla Lilies:
Gerbera Daisies:
Peonies:
Poppies:
Tulips:
Hydrangeas: