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Lathyrus sylvestris
''Lathyrus sylvestris'', the flat pea or narrow-leaved everlasting-pea, is a plant species of the genus ''Lathyrus''. It is native to parts of Africa, Europe, and Asia.〔(''Lathyrus sylvestris''. ) GRIN.〕
The narrow-leaved everlasting-pea forms a mat of herbage. The stems are winged. Each leaf is made up of two elongated leaflets. The flowers are pink. The fruit is a legume pod about 2 inches long.〔(''Lathyrus sylvestris''. ) USDA NRCS Plant Fact Sheet.〕
==Description==
The narrow-leaved everlasting-pea is a perennial plant which can grow by climbing with its tendrils. Without any support it can reach about tall. The stem is floppy and flat with wide wings. The leaves are alternate with short winged stalks and stipules. The leaf blades are pinnate with a single pair of narrow lanceolate leaflets with entire margins and three tendrils. The inflorescence has a long stem and three to ten pinkish-red flowers. These have five sepals and five petals and are irregular. The uppermost petal is known as the "standard", the lateral two as the "wings" and the lowest two are joined to form the "keel". There are ten stamens and a single carpel. The fruit is a long pod containing five to fifteen seeds.〔(【引用サイトリンク】title=Narrow-leaved Everlasting Pea: ''Lathyrus sylvestris'' )〕
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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