This name is a synonym of Allium campanulatum S.Watson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 18403607) with original publication details: Contr. W. Bot. 10: 85 1902.
This name was in version 1 of The Plant List, record tro-18403607, and has not been changed.