( photo / image / picture from sourlemons1990's Garden ) moderator's note: added a more descriptive title to topic
I think it is a dyed spider mum. It looks to be in a bouquet in a vase. Is there any foliage on the stem? otherwise rub your fingers up/down the stem, is it fragrant? not necessarily a pleasant smell, but the smell of a mum, none the less?
I agree with Carolyn. I think it is a dyed mum in a bouquet. Mums have an odor that is all their own. Unmistakable.