Allium fistulosum L. (Welsh onion, Japanese bunching onion) is a also known as green onion, spring onion, scallion, escallion, and salad onion; very similar in taste and odour to related common onion, Allium cepa, and hybrids between the two () exist; Welsh onion, however, does not develop , and possesses hollow leaves ("fistulosum" means "hollow") and