Sea pea Lathyrus japonicus
Watsonia 1977. R. E. RANDALL L. japonicus is a creeping or climbing perennial most commonly found on shingle beaches but occasionally recorded from dunes and other coastal habitats. It is fairly long-lived and once established it is not likely to disappear except where coastal changes or human pressure cause this to occur. Where beaches are accreting seawards and more closed vegetation enters as humus builds up, it disappears on older shingle but persists nearer the shore where the vegetation is open. Its seeds are avidly eaten by birds, and many animals, especially sheep, find the whole plant palatable. Brightmore & White (1963) suggest that an exceptional spread of L. japonicus at Rye Harbour from 1962 until 1964 resulted from dispersal of seeds by flocks of stock dove, Columba oenas. The plants cease flowering and soon die when heavily or frequently trampled. In eastern E. Sussex, V.c. 14, and E. Kent, v.c. 15, L. japonicus is much more ...