Difference between revisions of "Lathyrus japonicus"

Latest revision as of 11:26, 7 July 2010

"Beach Pea" redirects here. This is also used for Galactia species.

Lathyrus japonicus (common names Sea Pea, Beach Pea, Circumpolar Pea, Sea Vetchling) is a legume native to temperate coastal areas of Asia, Europe, North and South America.

It is a herbaceous perennial plant growing trailing stems to 50-80 cm long, typically on sand and gravel storm beaches. The leaves are waxy glaucous green, 5-10 cm long, pinnate, with 2-5 pairs of leaflets, the terminal leaflet usually replaced by a twining tendril. The flowers are 14-22 mm broad, with a dark purple standard petal and paler purple wing and keel petals; they are produced in racemes of 2-7 together.

The unusually extensive native range is explained by the ability of the seeds to remain viable while floating in sea water for up to 5 years, enabling the seeds to drift nearly worldwide. Germination occurs when the hard outer seed coat is abraded by waves on sand and gravel.

The pods can be eaten but like many members of the genus Lathyrus they contain β-oxalyl-L-α,β-diaminopropionic acid, which can cause paralysis called lathyrism. The leaves of the plant are used in Chinese traditional medicine.

References

• Den virtuella floran: Lathyrus japonicus distribution

• Lathyrus japonicus 2.jpg

  Whole plant

• Lathyrus japonicus 1.jpg

  Flowers

• Lathyrus japonicus, Pancake Bay PP.jpg

  Pancake Bay sand dunes, Ontario, Canada

de:Strand-Platterbse et:Rand-seahernes fr:Gesse maritime is:Baunagras nl:Zeelathyrus ja:ハマエンドウ no:Stranderteknapp pl:Groszek nadmorski ru:Чина японская fi:Merinätkelmä sv:Strandvial