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''Rubus flagellaris'', the northern dewberry,〔 also known as the common dewberry, is a North American species perennial subshrub species of dewberry, in the rose family. The plant is distributed across much of Canada, Mexico, and the United States. It grows in diverse habitats ranging from drier savannas to temperate deciduous forests. ==Description== ''Rubus flagellaris'' has low-growing stems that range from long, and flowering stems that can grow up to in height. It can grow as a woody vine or low growing shrub. The young stems are green with a scattered arrangement of hairy prickles. The old stems are brown, woody and have hard prickles in comparison to the young stem. Sometimes the tips of the young stems root into the ground and form vegetative offsets.〔〔(Flora of North America, ''Rubus flagellaris'' Willdenow, 1809. Northern dewberry, ronce à flagelles )〕 The species has its most active growth from mid-spring to early summer. The roots of the northern dewberry consist of a woody taproot.〔〔 The plant has an alternate compound leaf arrangement, with mostly three, but sometimes five leaflets attached. The margins of the leaves are serrated while the leaves show a palmate venation. Each leaflet is ovate, approximately three inches (75 mm) long and one inch (25 mm) wide. The leaflets are green on top, but pale green on the underside.〔 One leaflet of a set is connected by a petiole to the stem while the other leaflets in the set are connected to that terminal leaflet.〔 The plant produces a five-petaled white flower, each flower about one inch (25 mm) in diameter with five petals.〔 The flowers exhibit a terminal inflorescence with one to five flowers per young stem.〔 The flowers are hermaphrodites and have both female and male sex organs.〔>(【引用サイトリンク】work=Plants for a Future )〕 There are five sepals, green in appearance, lanceolate in shape. The ovaries exhibit a superior position relative to the sepals and petals. Several stamen surround a cluster of carpels.〔 The flowers would then open up at day time, but close up at night time.〔〔 Once the flowers of the northern dewberry are fertilized, drupes soon grow and replace each flower.〔 The drupes are a dark-purplish color and range from ½ inch to one inch in diameter.〔〔 Once the fruit has fully ripened it has a tart-sweet flavor.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rubus flagellaris」の詳細全文を読む スポンサード リンク
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