|Lathyrus japonicus is
a perennial herb found in sandy soil in seashores, the whole being
powdery white and stems angular. The stems crawl on the ground to
grow to about1m long, and the leaves are of a pinnately compound
leaf, with 6-12 leaflets, 1.5-3cm long, 1-2cm wide, and oblong.
Stipules are big, about the same size as the leaflets, and flowers
set themselves 3-6 in a racemose way. Vexilla are red-purple at
first and turn into blue-purple later. White flowers can occur
rarely. Bloom time: April-July.