The term 'Plant of the Arum Family' refers to three plants: AROID (5 letters), TARO (4 letters), and Jackinthepulpit (15 letters). AROID is a genus of flowering plants in the Araceae family, which includes many species of aroids. TARO is a tropical plant that is also part of the Araceae family and is widely cultivated for its edible corms and leaves. Jackinthepulpit is a common name for several species of plants in the Araceae family, which are known for their distinctive flowers. All three plants are members of the Arum family, which is a large family of flowering plants.