Fearing that the widow of John Lennon might use it for occult purposes, the surrealist master sent a blade of dried grass when she asked for some hair.
The story has come to light in recollections by Amanda Lear, a French singer, actress and model, who met Dali in the mid 1960s and remained close to him until his death aged 84, in 1989.
"Throughout his life, Dali could never resist the lure of a cheque," Miss Lear, now in her 60s told France's VSD magazine.
"Once he even sold a hair of his moustache to Yoko Ono.
She went on to explain that "Dali thought that Yoko Ono was a witch and might use it in a spell.
He didn't want to send her a personal item, much less one of his hairs.
So he sent me to the garden to find a dry blade of grass, and sent it off in a nice presentation box. »