Via Anthropologie. This long (29 inches) Charlotte Tarantola cardigan features elegant purple and gold lilies on a light tan background. The flowers continue over the shoulders and fall symmetrically down the back. I would pair the cardigan with black or brown slacks and pumps; also, obviously, some type of cami or other shirt is necessary underneath.
The cardigan is made from 100% cotton and comes in the pictured purple. It is an Anthropologie-standard priced $128; find it here.