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''Lepidium densiflorum'' is a species of flowering plant in the mustard family known by the common names common pepperweed and prairie peppergrass. It is a common and widespread plant in North America, where it grows in many habitats across Canada and the United States. It grows easily in disturbed sites and it is considered a weed in some areas. ==Description== ''Lepidium densiflorum'' is an annual or biennial herb producing a short, erect, branching stem up to about 30 centimeters in height. Leaves grow in a basal rosette at the base of the stem and reach up to about 10 centimeters long; leaves higher up on the stem are smaller and less prominently lobed. The plant produces raceme inflorescences of tiny flowers with sepals each only about a millimeter long. There are usually no petals, though sometimes vestigial petals appear near the sepals. The fruit is a few millimeters long. ==External links== *(Jepson Manual Treatment of ''Lepidium densiflorum'' ) *(USDA Plants Profile for ''Lepidium densiflorum'' ) *(GRIN Species Profile ) *(''Lepidium densiflorum'' — U.C. Photo gallery ) 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「Lepidium densiflorum」の詳細全文を読む スポンサード リンク
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