Lathyrus sativus or the Indian pea or grass pea, which grows in areas subject to drought. It has been cultivated in Greece since Neolithic times and is still grown in a few places—notably on the slopes of Mount Parnassos. It is rich in protein (Greeks generally boil it and prepare it like yellow peas or fáva), but over-consumption can cause a neurodegenerative disease called lathyrism—which is why consumption was long banned in Spain.
Historically it has been planted as a back-up crop, in case all else fails. Lathoúrí helped many rural Greeks survive the famine during World War Two.
Image by Sierra de’ conti