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Lamium amplexicaule
''Lamium amplexicaule'', commonly known as henbit dead-nettle or greater henbit, is a species of ''Lamium'' native to Europe, Asia and northern Africa.
It is a low-growing annual plant growing to tall, with soft, finely hairy stems. The leaves are opposite, rounded, diameter, with a lobed margin. The flowers are pink to purple, long. The specific name refers to the amplexicaul leaves (leaves grasping the stem).
==Description==
Henbit deadnettle is an annual herb with a sprawling habit and short erect squarish, lightly hairy stems. It grows to a height of about . The leaves are in opposite pairs, often with long internodes. The lower leaves are stalked and the upper ones stalkless, often fused, and clasping the stems. The blades are hairy and kidney-shaped, with rounded teeth. The flowers are relatively large and form a few-flowered terminal spike with axillary whorls. The calyx is regular with five lobes and closes up after flowering. The corolla is purplish-red, fused into a tube long. The upper lip is convex, long and the lower lip has three lobes, two small side ones and a larger central one long. There are four stamens, two long and two short. The gynoecium has two fused carpels and the fruit is a four-chambered schizocarp.〔(【引用サイトリンク】title=Henbit dead-nettle: ''Lamium amplexicaule'' )〕
This plant flowers very early in the spring even in northern areas, and for most of the winter and the early spring in warmer locations such as the Mediterranean region. At times of year when there are not many pollinating insects, the flowers self-pollinate.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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