Corbula pisum, Hempstead beds.
"The Student's Elements of Geology"
Sir Charles Lyell
46. Pease, pisum: the Pod of the Sugar-Pease, when first beginning to appear, with the Husk and Tendrels, affording a pretty Acid, enter into the Composition, as do those of Hops and the Vine.
"Acetaria: A Discourse of Sallets"
John Evelyn