Thanks Bookwoman. If I break off the grassy part it just smells like cut grass. No onion smell. I'll cut a bulb later and let you know what that smells like.

Grape hyacinth??

Hm... If they're Grape Hyacinth they haven't flowered yet. Guess I'll find out in a couple weeks. Is there another way to tell?

If it just came up, it's not grape hyacinth, the foliage of which would have come up last fall. There are lots of off-beat bulbs around, but this foliage looks sort of like Ornithigalum, Star of Bethlehem, which may have started as ornamentals, but will take over your entire property in no time at all. I hope I'm wrong.

It looks like the wild onions we have, too, but there is definitely a scent. Ours grow like weeds...

Ornithogalum has flat bladed leaves not tubular. It would be good to know where these are growing, geographically. I wasn't aware that grape hyacinth was evergreen in cold areas.

It's not really evergreen, floral. It goes dormant in late spring, then comes back up (just the foliage) in the fall, and remains until it flowers.

Thanks everyone. This is growing in a yard in New York City. The leaves are not bladed and they don't have a stripe on them.

Perhaps I wasn't clear. By evergreen I meant green throughout the winter. In my climate it is a spreading nuisance which is green all year round but if the OP has very cold winters I was thinking that Muscari could well only appear in spring. I am by no means insisting that this is Muscari but it isn't Star of Bethlehem and nor does it seem to be an Allium if it has no onion smell.

Wild onion... I fight them constantly and they multiply quickly and I'm in North NJ.

so the solution is to dig them out?

That's the only solution that has worked for me. I dig up trowel sized clumps, pull out ALL the bulbs I can find and refill the hole. It frequently takes multiple attempts to get all of the little bulbs. My previous "postage stamp" property was a challenge, my current 1.5 acres is never-ending...

This doesn't looks like the wild onions you usually see in the NY area--they don't tend to flop over like that particularly this time of year. If they don't smell like onion, I'd be inclined to think not allium as well. In any case, for any small bulbed weed (allium, star of bethlehem, etc), the solution rjs5134 mentions is the most effective, as bulbs with fine foliage don't respond well to herbicides.

Do you have a local Ag. center you can take it to for a positive ID?

OP is in NYC, so no easy to find Ag center. I hope that they post a picture when/if the mystery bulbs bloom.

its hard to tell without a closer look. Wild onion/garlic doesn't seem to fall over like that and tends to be thinner. Although mature or aged plants of wild onion/garlic will have much thicker leaves and be an overall fuller plant...as the picture shows. Also, if the temperature rose prematurely (especially soil temperature) that may cause the plants to fall over like.

Maybe the previous owner had a some cultivated onion (as opposed to wild onion) growing in a garden.

what is it? That's exactly the plant taking over every flower bed. I didn't plant it and even when I think I've pulled it out, it comes back. I guess it leaves nasty little baby bulbs. Herbicide? or what to get it gone.

The top picture looks like wild onion and the bottom picture looks like Star of Bethlehem to me. Remember there are probably different subspecies of each. Either way its a bulbous plant and recognized as difficult to control. So treat it with an herbicide while its actively growing.

In this case, "actively growing" means treat it in late winter and/or early spring.

"difficult to control" means treat it with a herbicide then treat it again after two weeks

If you do not like herbicides, vinegar is supposed to kill top growth down to the roots. It will grow back so you have to keep treating it with vinegar till it loses all its energy reserves and the root dies. Again, more difficult with a bulbous root plant. Also there are oil based herbicides on the market now that use clover oil and other oils. Though you should read the label to make sure it works on bulbous weeds such as wild onions.

Else hand pulling is an option

If that does not smell like an onion when the bulb is bruised or cut then it is NOT oinion. If, rather than laminar (as in peeling back the layers of the onion) when cut it is solid then it is possibly Camas which you do not want to eat (can be fatal). It is smart to make sure a "wild onion" is identified both by smell and structure as opposed to "looks just like" before eating it. Obviously, if it is camas it should be eradicated.

Todd, did you ever determine what these plants are? I'm in north Texas and my yard looks almost exactly the same as yours. Did yours flower?

Looks like Star of Bethlehem to me.

The leaves in the original photo appear to be tubular rather than flat bladed. If that is correct it can’t be SOB. The OP said the leaves were not bladed and had no stripe.

What did this turn out to be? I have the same thing and can't identify it. It definitely has NO onion smell. Doesn't grow as tall as wild onion and is darker green. Never flowers. Grows very early spring and dies back late spring. Keeps spreading more every year.

HU many numbers. Take good pictures of your plants and start your own dedicated post. Don't forget to give your geographical location too. As you can see from the previous discussion there are multiple similar looking plants and we cannot know what you have unless we see your actual specimens.