Separate species but apparently similar flavor. According to what I read there is a bit of a bulb, which would be more than garlic chives. It probably self sows, too, most such alliums do, just like the regular garlic chives. Give it an inch and it may take your yard...

Perhaps your ground is deficient in sulfur, which can lead to lack of flavor in any allium.

Edit: btw some botanists recognize over 900 species in Allium, many of which are very difficult to tell apart.

Lol It's difficult for chives/garlic chives to become weedy in my area due to the lack of water and soil type. I've seen them in action though. They have a hard time getting a foothold on our local soil but they'll dang sure take over the flower pot next to them and the ones next to those.

The only allium that I've seen do well in our local soil without compost or fertilizer were some shallots that FAILD one year in good soil. I was disappointed and threw them off to a dry barren unplanted area. They were mostly tiny Red Sun and a few Golden Gourmet bulbs. I shoud have ate the sets when I bought them. Anyway, I left them there with no water and no care at all, forgotten. Guess what? They formed some nice healthy clumps of tiny bulbs. I'm now tempted to dig them up, separate, and replant them in regular dirt. Then, just water and see what they do.

Hmm that's interesting about the sulfur. I've been told that my smaller varieties of bunch onions don't have a strong taste but it may be just because of the variety. My large White Nebuka bunch onions have a VERY strong onion taste. I was thinking of trying other varieties of garlic chives that people say are stronger tasting and giving away my current flavorless clumps to a friend who doesn't have any growing in her yard. She may appreciate the mild to no flavor. Lol Her soil is less firtile and drier than mine, with less of a chance of of the Garlic Chives taking over but that mint growing in her yard is a TANK of a plant. I'm afraid to grow mint, seeing what those things can do.

I've been reading up on grey shallots and how the wild type actually grows flowers. I can't even tell the difference between bunch onions and their wild ancestor. It looks like the same plant to me. Lol I have a hard enough time figuring out if some of the alliums that I have, are truely what they are. Im suspecting two that I thought were bununch onions (a. fistulosum) may be a variety of (a. cepa) or some sort of cross because of how the leaves grow. One of the individual plants that I grew from seed, grew top sets with a few flowers. It was similar to a picture of somebodies plant that I've seen here on this forum. I'm currently growing those topsets out to see what they do. I don't have high hopes that it's permanent though because I've even seen odd garlic behaviour and the plant may just revert back to it's original normal habit as the garlic did.