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Stellaria monosperma var. japonica

Stellaria monosperma var. japonica

Stellaria monosperma var. japonica

Stellaria monosperma var. japonica

わが国の本州、岩手県以南から四国・九州に分布しています。山地の湿った林内に生え、高さは40〜80センチになります。茎は上部で分枝して、毛が生えます。葉は長楕円状披針形で対生し無毛、縁は全縁で波打ちます。8月から10月ごろ、上部の葉腋から花柄をだし、集散状に白色の花を咲かせます。花弁は5個で、先端は2深裂し、萼片より短いのが特徴です。萼や花柄には腺毛が生えます。 
ナデシコ科ハコベ属の多年草で、学名は Stellaria monosperma var. japonica。英名はありません。 
"Ooyama-hakobe" (Stellaria monosperma var. japonica) belongs to the Caryophyllaceae (the Carnation family). It is a perennial herb that is native from Iwate prefecture of Honshu south to Shikoku and Kyushu. This herb grows in wet forests, and it can reach 40-80 cm in height. The stem is branched at the upper part and hairy. The leaves are oblong-lanceolate, opposite and glabrous with entire and scalloped edges. The peduncles are born at the upper axils and bloom small white flowers in the cymose clusters from August to October. The petals are five, divided into two deeply incised lobes, and shorter than the sepals. The calyces and peduncles are covered with glandular hairs. 
茨城県北茨城市華川町小豆畑にて、2013年11月03日撮影。 

Shu Suehiro
shu@botanic.jp