An answer in your food knowledge quiz (LET, January 25) was inaccurate. Samphire is not a seaweed, it is a member of the umbelliferous family and closely allied to the better-known fennel. It was the stem that was formerly used in pickles or cooked in butter. It is, of course, a salt marsh plant and was reasonably common in the Fens.

JULIAN PILLING, Railway Street, Nelson.