''Rhododendron kiusianum'', the Kyushu azalea, is a species of flowering plant in the family

Ericaceae The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acidic and infertile growing conditions. The family is large, with c.4250 known species spread across 124 genera, making it th ...

, native to

Kyushu is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surroun ...

, Japan. It is a parent of a large number of hybrid dwarf azaleas. It is the official flower of

Unzen, Nagasaki is a city located in Nagasaki Prefecture, Japan, on the northern tip of Shimabara Peninsula, facing Ariake Bay in the east and Mount Unzen to the south. As of November 2018, the city has an estimated population of 42,457 and a population density ...

, and of

Kagoshima Prefecture is a prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,599,779 (1 January 2020) and has a geographic area of 9,187 km2 (3,547 sq mi). Kagoshima Prefecture borders Kumamoto P ...

References

kiusianum Endemic flora of Japan Plants described in 1914 {{Ericaceae-stub