I bought a couple of ornamental onions at a plant sale about 4 years ago - 'Ivory Queen' was one but unfortunately I lost the tag for the other. I thought at first it was 'Summer Drummer' but as its been growing bigger over the past couple of years I started to think that maybe it was twisted leaf garlic - Allium obliquum - because the leaves have a twist to them. Finally about a month ago it started sending up a flower stalk but still hasn't open yet.
This stalk now makes the plant well over 5ft tall, but its not a round bud so I'm stumped as to what I have.
Any thoughts on what it might be would be appreciated while I wait for the bud to open.



photo taken April 2022


photo taken June 2022


close up of leaves, June 2022




Unknown allium (circle in upper right corner) compared to 'Ambassador' in the foreground - it should be noted that the unknown is located an additional 18" below on a lower terrace