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Hachijō-kibushi (ハチジョウキブシ),'Stachyurus praecox var. matsuzakii' is a cultiver of Stachyurus praecox, and is only found in Japan. Compare to the other Stachyurus praecox species, it has thicker branches, longer inflorescences, and larger fruits.

Distribution
'''Stachyurus praecox var. matsuzakii''' is native to southern part of Japan, and is mainly grown around Izu Islands and Tōkai region. It was first discovered in Hachijō-jima island (八丈島) among the Izu Islands, and this is the origin of the name Hachijō-kibushi (ハチジョウキブシ) in Japanese, where kibushi means Stachyurus praecox. It is also found near the volcano in Miyake-jima island.

Habitat and Ecology
'Stachyurus praecox var. matsuzakii' is a deciduous shrub that grows on mountainous regions that are near the coast. It was adopted to a relatively humid environment with warm temperature since some of them are known to be growing at the gap that the volcano had made.

Morphology
'''Stachyurus praecox var. matsuzakii''' is a deciduous shrub. It has 5m long height which is higher than other Stachyurus praecox species. The ovate-shape leaves are thin, and they grow alternatively. The size of spikes is very large, and will grow more than 20 cm.

Flowers and fruit
The pendulous flowers are bell shaped, consisting four petals, and the yellow-cream spike inflorescence emerges from axils. The flower heads are 1 cm long, and are usually bloom around March to April. Male flowers and female flowers are separated. A male flower has eight stamens in two whorl-shaped flower with one style. A female flower has shorter spikes. Although it is hard to distinguish a male flower and a female flower from the physical appearance, the length of the inflorescence is often longer for male. The fruits are berries with persistent style and contain many seeds.

Application of Flowers and Fruits
The flowers can be used for Ikebana, the Japanese art of flower arrangement, as well as in a Japanese garden. The fruits it produce are used for color dyeing.