In 1 Corinthians 15:37, which grain does Paul name as an example of a bare seed that is sown?

Answer: Wheat

Explaining the resurrection body, Paul says what you sow is not the body that will be, but a seed, "perhaps of wheat or something else."

“You fool! What you sow does not come to life unless it dies. And what you sow is not the body that will be, but just a seed, perhaps of wheat or something else.”— 1 Corinthians 15:36-37 (BSB)