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A Magnolia denudata is a deciduous tree that is part of the Magnoliaceae plant family. It is native to eastern Asia, but has been cultivated in several countries. Landscapers utilize the Magnolia denudata in various ways, but usually as a specimen tree. Its white flowers and red cone-like fruits liven any landscape. It can be adversely affected by the fungal disease leaf spot and by tiny insects called scales.
The species name denudata is derived from the Latin word for "naked." It refers to the fact that the flowers bloom when the tree is leafless. This tree is also called Magnolia heptapeta or yulan magnolia.
Magnolia denudata is native to the eastern and southern regions of China. It has been cultivated for hundreds of years as a medicinal plant. The flower buds were used in traditional medicine to treat headaches and sinusitis.
Generally, Magnolia denudata grows 30-40 feet (9 to 12 m) in height and spreads a similar length. It has a rounded form that features a dense foliage of dark green leaves. The leaves are 4 to 7 inches (10-17.5 cm) long, and they will drop in the fall.
This tree produces fragrant white flowers that are shaped like a vase. They are 3 to 4 inches (7.5-10 cm) long and typically bloom early in the spring. By the summer, green fruits emerge and gradually turn red by late summer as they become ripe.
To grow well, Magnolia denudata requires well-draining, fertile soil. The area in which the tree is placed should be exposed to full sunlight for best results, but it can tolerate partial shade. It should be planted in a somewhat sheltered area to protect against wind damage.
A common plant disease that affects Magnolia denudata is leaf spot. It is characterized by brown or black spots on the leaf, which eventually cause the leaf to yellow and curl. The fungus is usually present in dead leaves or other plant debris from the previous season. Rain and wind carry the spores onto the tree. It is recommended to clear away plant debris and spray a fungicide onto affected branches to prevent the fungus from spreading.
Tissue damage resulting from scale infestation is another problem that affects Magnolia denudata. The gnat-like insect sucks the sap out of the leaves and branches. It also excretes a sticky substance that serves as a growth medium for fungal spores. An insecticide spray can be used to reduce the infestation.