Carrot tops amongst the lawn grass?

With shorn mown grass burnt by the sun, I've taken a section of front lawn and spread some heirloom carrot seeds around upon it as well as watering a few times. I don't use chemicals on my lawn, so I'm curious about growing a few carrots in that area. So this is an experiment.

However watering it seems to have activated some of the annoying deep rooted weeds I thought I'd removed from it. Perhaps by seed or remaining root stems, they are shooting up. It's annoying as I thought I'd cleared them all and was congratulating myself on that progress.

Can't find the name of the weed. It has a thick root, with leaves that come out in a circle around that and flat with the earth. When it flowers, it sends stems out from the center with little ovoid heads on them that have little white stems extending from their middle, with small white blobs on the ends.

The match stick trick worked out nicely - one potato shoots leaves are almost double what they were before! Perhaps because there's some organic fertiliser in there with it.

Though I looked at the chart and technically it's not the time to put in potatoes in these parts, that's supposed to have ended last month. But...still going to do at least three more buckets. But also try to grow carrots and beetroot in them. Got alot of carrot seeds from plants that went to seed, including a heirloom that I must keep marked separately.