おきなわはぐま (沖縄白熊) [Index] [Back] わが国のトカラ列島以南の南西諸島に分布しています。山地の渓流沿いや道ばたなどに生え、高さは３０〜８０センチになります。葉は広卵形から卵形でやや厚く、先端は尖って、無毛で光沢があります。葉は下部に集まって輪生状につきます。ほぼ一年中、花茎を伸ばして、その上部に多数の頭花を咲かせます。頭花は直径８ミリほどの白色の小花３個からなり、枝先に総状につきます。小花の花冠は５深裂し、裂片は頭花の外側に偏って並びます。果実は長さは７ミリの痩果で、羽毛状の冠毛がつきます。別名で「おきなわていしょうそう（沖縄禎祥草）」とも呼ばれます。 キク科モミジハグマ属の多年草で、学名は Ainsliaea macroclinidioides var. okinawensis。英名はありません。 The "Okinawa-haguma" (Ainsliaea macroclinidioides var. okinawensis) belongs to Asteraceae (the Aster family). It is an evergreen perennial herb that is distributed in the Nansei Islands, south of Japan's Tokara Islands. It grows along mountain streams and on roadsides, reaching a height of 30 to 80 cm. The leaves are broadly ovate to ovate, somewhat thick, with pointed tips; they are glabrous and glossy. The leaves are clustered at the base and arranged in a whorled pattern. It produces flower stalks almost year-round, bearing numerous flower heads at their tips. Each capitulum consists of three small white flowers, about 8 mm in diameter, and is arranged in a raceme at the tips of the branches. The corolla of each small flower is deeply five-lobed, with the lobes arranged toward the outer edge of the capitulum. The fruit is an achene 7 mm long, bearing a feathery pappus. It is also known by the alternative name "Okinawa-teisho-so". 茨城県つくば市「つくば実験植物園」にて、2026年03月28日撮影。 Shu Suehiro shu@botanic.jp