Tiny yellow stars

[Martin Bohnet]

those came up in two different pots - one of which is of a plant I bought last fall? they are either very fast from seed, or something I put in there totally absent minded?

Does not smell like onion (or maybe only faintly so), and opens up in the evening. produces more than one stalk per bulb

[WimB]

It's a Gagea sp., but I'm not up to speed with the different species...

[Martin Bohnet]

Hmm - I've looked up a few Gageas and none of them had that papery bract at the base of the umbel, and I find them rather late for any gageas (they are still flowering). My "gut feeling" points more towards Themidaceae, though I couldn't rule out the gageas completely.

[Dennis Kramb]

Is it a Hypoxis species?

[Martin Bohnet]

That's what Inaturalist suggested, but I'm sceptical. I've done a review of some EX data lately, and my current suspect is Nothoscordum felipponei

donated by @Uli - mine looks like a starved form of those depicted in the wiki...

[Uli]

Hmmmm...., I don't know. I have no pictures of my own plants in flower but the fotos in the WIKI show flowers with much broader petals. 
Also, my Nothoscordum felipponei flowers in late winter (outdoors in a Mediterranean Climate) and has been dormant for weeks. It would surprise me that it would behave so differently in your climate, @Martin Bohnet.
Uli 

[Fermi]

Possibly Nothoscordum ostenii though I think this has had a name change
cheers
fermi