ヒメウツギは木が大きく、枝が太く、逞しい「空木」に対し、木が小さく、枝が細く、しなやかな「姫」。清楚な花々を華やかに咲かせます。
Compared to its close relative, Deutzia crenata, the Slender Deutzia is smaller with finer, more supple branches, giving it a graceful, princess-like appearance. It produces a profuse and beautiful display of pure white flowers.
【仮名】ヒメウツギ
【和名】姫空木
【英名】Slender Deutzia
【学名】Deutzia gracilis
【誕生】05/ 19, 05/ 22
【開花】04, 05月
【花色】White
ヒメウツギ
ヒメウツギの概要
ヒメウツギはアジサイ科ウツギ属の落葉低木。本州の関東以西、四国、九州に分布し、陽当たりがよく、湿り気もある崖地、岩場、林縁で自生しています。木が大きく、枝が太く、逞しい「空木」に対し、木が小さく、枝が細く、しなやかな「姫」。清楚な花々を華やかに咲かせます。
ヒメウツギの名前
ヒメウツギは「小さな空木」という意味。空木は枝が中空であることから「うつろな木」の転訛です。属名ドイッツィアはスウェーデンの植物学者カール・ツンベルクを支えたオランダの貴族ヨハン・ファン・デル・ドイッツへの献名。種小名グラキリスは「繊細な」という意味です。
ヒメウツギの姿形
ヒメウツギの根は浅く、細根が密に伸びます。枝は基部から分枝。古くなると芯が消失して空洞になります。葉は対生の披針形。縁に鋸歯があります。花は枝先で集まって咲き、花弁が５枚、翼のある雄しべが10本。花後は半球形の蒴果を結び、熟すと裂けて小さな種子を散らします。
ヒメウツギの近縁
ヒメウツギの近縁「空木」も同じように枝の芯が空洞。花は白色の花弁が５枚で、雄しべの花糸に肩を張ったような翼があり、黄色の葯が並びます。一方、丈が高く、葉の表面に星状毛が生え、触るとザラザラ。花は一カ月ほど遅く、下を向いて咲き、花糸の翼の肩が尖っていません。
Slender Deutzia
The Slender Deutzia is a deciduous shrub in the Hydrangeaceae family. Native to Japan, it is found from central Honshu (west of the Kanto region) to Shikoku and Kyushu. It thrives in sunny yet moist environments, such as cliffs, rocky outcrops, and forest edges. Its delicate form and elegant blooms have earned it a reputation as the “princess” of the Deutzia genus.
In Japanese, its name (Hime-utsugi) translates to “a Deutzia as small and beautiful as a princess.” In contrast, the name for Deutzia crenata (Utsugi) means “hollow-branched tree.” The genus name Deutzia honors Johann van der Deutz, a Dutch nobleman and patron of the Swedish botanist Carl Peter Thunberg. The species epithet gracilis means “slender” or “delicate.”
The plant features a shallow, dense system of fine roots. Its branches spread from the base; as they mature, the center becomes hollow. The leaves are opposite, lance-shaped (lanceolate), and have finely serrated edges. The flowers bloom in clusters at the tips of the branches, each featuring five petals and ten winged stamens. After flowering, it develops hemispherical seed capsules that split open when ripe to disperse tiny seeds.
Like the Slender Deutzia, its relative Deutzia crenata also has hollow branches. Its white flowers have five petals and filaments with broad, wing-like shoulders topped with yellow anthers. However, Deutzia crenata grows much taller and has leaves covered in stellate (star-shaped) hairs, giving them a rough texture. The flowers bloom about a month later, facing downwards, and the shoulders of the winged filaments are not pointed.
