Can you give your geographical location? It's something in the Brassicaceae, of which there are hundreds of yellow species.

Hi - I am in Rhode Island. I looked up the Brassicacae -- lots of them as you said Thanks for clue.

Perhaps Barbarea vulgaris, slightly stunted from being in a pot. https://gobotany.nativeplanttrust.org/species/barbarea/vulgaris/

Interesting. So it gets taller I guess, as you say it may be stunted being in the pot. It was only in that pot for about 2 weeks. - I kind of like it but it is considered a weed by some. Thanks so much for your i.d. ---