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Lathyrus tuberosus
''Lathyrus tuberosus'', also known as the tuberous pea, tuberous vetchling,〔(Tuberous Vetchling ), Ontario Wildflowers
〕 earthnut pea, or aardaker, is a small, climbing perennial plant, native in moist temperate parts of Europe and Western Asia. The plant is a trailer or weak climber, supported by tendrils, growing to 1.2 m tall. The leaves are pinnate, with two leaflets and a branched twining tendril at the apex of the petiole. Its flowers are hermaphroditic, pollinated by bees. The plants can also spread vegetatively from the root system.
==Description==
''Lathyrus tuberosus'' is a perennial plant with edible tubers long attached to its roots. The stem grows to and is sprawling, wingless and nearly hairless. The leaves are alternate with short stalks and narrow stipules. The leaf blades are pinnate with a single pair of broad lanceolate leaflets with blunt tips, entire margins and a terminal tendril. The inflorescence has a long stem and two to seven pinkish-red flowers, each long. These have five sepals and five petals and are irregular, with a standard, two wings and a fused keel. There are ten stamens and a single carpel. The fruit is a flat brown pod containing up to six seeds. This plant flowers in July and August.〔(【引用サイトリンク】title=Tuberous pea: ''Lathyrus tuberosus'' )〕
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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