Erechtites valerianifolius, common name tropical burnweed is a New World species of plants in the sunflower family. It is native to Mexico, Central America, South America, and the West Indies. It is a

In botany, the petiole, commonly known as the leaf stem or leaf stalk, is the stalk that attaches the leaf to the twigs, branches or stems of a plant. The terms petiolate and apetiolate are applied, r