The term TYPE OF FLOWER can refer to four different flowers: IRIS (4 letters), LILY (4 letters), Petunia (7 letters), and Tearose (7 letters). IRIS is a genus of flowering plants with showy flowers, which are commonly known as the 'flags' of the garden. Lilies are a group of flowering plants that are often associated with purity and innocence. Petunias are a genus of flowering plants in the family Solanaceae, which are popular garden flowers. Lastly, Tearose is a hybrid rose variety that was developed in the Netherlands in the late 20th century.