ハナズオウ（花蘇芳、Cercis chinensis）は中国原産のマメ科ジャケツイバラ亜科[1]の落葉低木で、春に咲く花が美しいためよく栽培される。
高さは2-3mになり、葉はハート形でつやがあり、葉柄の両端は少し膨らむ。早春に枝に花芽を多数つけ、3-4月頃葉に先立って開花する。花には花柄がなく、枝から直接に花がついている。花は紅色から赤紫（白花品種もある）で長さ1cmほどの蝶形花。開花後、長さ数cmの豆果をつけ、秋から冬に黒褐色に熟す。花蘇芳の名は、花弁の色がスオウ（蘇芳）で染めた色に似ているため。
Cercis chinensis, the Chinese redbud (simplified Chinese: 紫荆; traditional Chinese: 紫荊; pinyin: Zĭjīng) is a plant of the Fabaceae family native to China and Japan that grows between 150 to 1,400 metres (490 to 4,590 ft) above sea level.
As a tree, the Chinese redbud may grow up to 15 metres (49 ft) tall with a trunk diameter of up to 50 centimetres (20 in), however, the species is normally found growing in shrub form. The flowers are pink or milky white in color whilst the leaf body is almost circular in shape, 6 to 14 centimetres (2.4 to 5.5 in) in length and tapers to a point at the end. Flowering in April, the Chinese redbud produces fruit in October.