Final answer:
The fraternity flower mentioned is the White Carnation, and it is shared with the sorority Delta Delta Delta. Flowers symbolize unity and recognition in Greek organizations.
Step-by-step explanation:
The fraternity flower is the White Carnation, and the sorority that shares this symbol with them is Delta Delta Delta (Tri Delta). Fraternities and sororities often have specific symbols, rituals, and traditions that are significant to their organization's heritage and identity. Among these symbols, flowers hold a special place as they promote a sense of unity and recognition amongst members both within a single fraternity or sorority and sometimes across different Greek organizations. The selection of a fraternity or sorority flower can often be traced back to the founding values or characteristics that the organization aims to embody.