Sinojackia xylocarpa, commonly known as Jack Tree, is a deciduous tree native to the forested hills and slopes of Southeast China. It is a member of the Styracaceae family, which is notable for its ornamental flowering plants. The Jack Tree typically grows to about 7 meters tall, with a trunk diameter up to 10 cm. Its form is upright with a rounded crown, and it produces inflorescences that are 3–5 cm long, each bearing three to five showy white flowers with five petals. The flowering season occurs in the spring and early summer, providing a beautiful display that can enhance any garden setting.

The Jack Tree is valued for its attractive flowers and relatively small size, which makes it suitable for smaller gardens or as a feature tree in larger landscapes. It is also used in urban settings for its adaptability and ornamental qualities. This tree prefers well-drained soils and can tolerate a range of soil types, though it thrives best in loamy soils. While it can grow in full sun or part shade, it requires consistent moisture to establish well and achieve optimal growth. There are no widely known cultivars of this species in the horticultural trade, but its rarity can make it a unique addition to a collection. Potential problems include susceptibility to pests and diseases common to the Styracaceae family, but these are generally not severe. The Jack Tree is not known for aggressive roots or invasiveness, making it a safe choice for most gardens.CC BY-SA 4.0