Leitneriaceae is a family of flowering plants that consists of just one genus, Leitneria. Some synonyms used for this family include the common name incense tree family, as well as the scientific name Leitneriales. The incense tree is the only member of this plant family and is native to North America. The tree produces a sweet resin with a fragrance similar to vanilla, which is often used in incense and perfumes. The Leitneriaceae family has unique characteristics that distinguish it from other plant families, including its dioecious reproductive system - meaning that it has separate male and female trees. Although the family is not particularly diverse, it remains an important part of North American ecological systems.