Scientific name: *Edgeworthia chrysantha* Lindl
Common Names: Huang Ruixiang, Knotted Flowers
English Name: Oriental Paperbush
Botanical Section: Ruixiang Branch
Morphological Characteristics:
*Edgeworthia chrysantha* is a deciduous shrub that can grow up to 2 meters in height. It features thick, sturdy branches with a brownish-red color and distinct lenticels. The leaves are thin and papery, typically elliptic-oblong or elliptic-lanceolate in shape, measuring between 8-16 cm in length and 2-4.5 cm in width. The base of the leaf is wedge-shaped and extends down the stem, while the tip is either acute or blunt. The upper surface of the leaves is covered with soft hairs, and the underside is bristly.
The flowers are yellow and highly fragrant, appearing in dense clusters. They have lanceolate sepals that are about 3 cm long, and the calyx is tubular with dense hair on the outside. The petals are petal-like in appearance. The fruit is ovate and usually enclosed at the base of the perianth.
Flowering occurs from March to April, and the fruits mature by August.
Distribution:
This plant is commonly cultivated in gardens throughout our province. It is naturally found in regions south of the Yangtze River Valley, as well as in the southwest, Henan, and Shaanxi provinces.
Growth Habits:
*Edgeworthia chrysantha* thrives in warm and mild climates. It prefers partial shade but can tolerate full sun. However, it is not cold-resistant. The root system is sensitive to waterlogging and performs best in fertile, well-drained soil. It tends to grow more prominently at the base of the trunk and the neck area.
Propagation Methods:
The plant can be propagated through ramets, cuttings, and layering techniques.
Pests and Diseases:
Common issues include viral leaf diseases, white feather disease, and infestations by the brown thorn moth.
Uses:
With its soft texture, long leaves, and elegant posture, this plant is visually striking when flowering in clusters, releasing a pleasant fragrance. It is ideal for solitary planting, as an ornamental in courtyards, along roadsides, against walls, in lawns, or paired with rockeries. It also makes a great potted plant.
Additionally, the plant has incense and insect-repellent properties. Its roots, stems, and flowers are used in traditional medicine for their ability to promote blood circulation, reduce swelling, and relieve pain. The bark fibers can be processed into paper and rayon. The entire plant is also used medicinally to relax muscles and treat swelling and pain. Furthermore, it has been utilized as a natural pesticide.
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