Dan

"(the scattering of crumbs caught in the icing, the squashed appearance of the 'n' in 'Dan,' which got too close to a rose)" (Cunningham, 99-100).

Dan is Mrs. Brown's husband, whom she convinces herself that she loves. It is very symbolic that part of Dan should be ruined by a flower. This flower represents Mrs. Brown herself, not only because she is a female, but because she is not being truthful to herself or to him. (Edit) Cunningham also did this because flowers were important symbolism in Mrs. Dalloway.