The term 'Member of the Nightshade Family' can be summarized by two crossword solutions: TOMATO (6 letters) and Petunia (7 letters). Both TOMATO and petunia are members of the nightshade family, which is a group of flowering plants that includes many species of vegetables, herbs, and spices. The TOMATO is a widely cultivated plant that is used in many dishes and is a major source of nutrition. Petunias are popular garden flowers that come in a variety of colors and sizes.