The term 'N American Plant' can be summarized as Dogbane, a seven-letter plant native to North America. Dogbane is a genus of flowering plants in the Apocynaceae family, which includes over 200 species of perennial, herbaceous plants. It is found in many parts of the world, but is most common in North America. Dogbane is known for its toxic properties and has been used as a medicinal plant for centuries.