U
- Allium ubinicum
- Allium ubsicolum
- Allium udinicum
- Allium ugami
- Allium umbilicatum''
- Allium uniflorum
- Allium unifolium : Oneleaf Onion; One-leaved Onion
- Allium uratense
- Allium urceolatum
- Allium urmiense
- Allium ursinum : Ramsons; Buckrams
- Allium ursinum var. ucrainicum
Read more about this topic: List Of Allium Species